Class 6

Students can Download English Lesson 1 Sea Turtles Questions and Answers, Summary, Activity, Notes, Samacheer Kalvi 6th English Book Solutions Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations

Tamilnadu Samacheer Kalvi 6th English Solutions Term 1 Prose Chapter 1 Sea Turtles

Talk about

Question 1.
Have you seen turtles? Where do they live?
Answer:
Yes, I have seen turtles. They live in the sea.

Question 2.
What do you know about turtles?
Answer:
I know that turtles live long.

Question 3.
Why do you think the turtles in the picture have names such as Leatherback and Hawksbill?
Answer:
There are reasons why they are called such names. The turtle called leatherback has its back like leather. It has a strong and rough back. The turtle called hawksbill has a long neck like the peak of a hill or mountain.

Put (✓) for the correct and a (×) for the incorrect statements.

1. Turtles are different from tortoises. (✓)
2. Turtles are sea animals. (✓)
3. There are seven kinds of sea turtles in the world. (✓)
4. Sea turtles are very small. (×)
5. Turtles come ashore to lay eggs. (✓)
6. Sea turtles come to rest on land. (×)
7. Olive Ridleys are the only sea turtles seen on Indian shores. (✓)

Are these statements right? Discuss with your partner and (✓) them if they are correct. Correct them if they are wrong. Share your answers in class.

1. Female Olive Ridleys come ashore at night to lay eggs. (✓)
2. The eggs of an Olive Ridley are in the shape and size of a cricket ball. (×)
3. Ridleys come to lay their eggs in the month of January. (✓)
4. The turtles use their flippers and make a hollow for their nests. (✓)
5. The hatchlings use a tiny egg-tooth to come out of the eggs. (✓)

Fill in the table given below

Answer:

Read and Understand

A. Choose the correct answers. You may choose more than one answer If needed.

Question 1.
The _______ is a biological relative of tortoises.
(a) sea turtle
(b) fish
(c) reptile
Answer.
(a) sea turtle

Question 2.
In India’s coastal waters we can see a species of _______
(a) tortoises
(b) sea turtles
(c) dolphin
Answer:
(b) sea turtles

Question 3.
Sea turtles come to the shore to
(a) visit their birthplace
(b) lay eggs
(c) go back to sea
Answer:
(b) lay eggs

Question 4.
It is a problem for sea turtles to come ashore because _______
(a) they find it difficult to walk on the sand
(b) they don’t know their way to the shore
(c) animals and people hunt them
Answer:
(a) they find it difficult to walk on the sand

Question 5.
A turtle’s flippers help it to _______
(a) swim
(b) dig a nest
(c) climb
Answer:
(a) swim

Question 6.
A sea turtle camouflages its nest by tossing sand on it to _______
(a) hide its eggs from predators
(b) incubate eggs in the warmth of the sun
(c) keep the hatchlings safe
Answer:
(b) incubate eggs in the warmth of the sun

Vocabulary

B. Find any five words related to sea from the text (Sections I & II). Write them below. Then use the words to frame sentences of your own.

eg: beach – We like to play On the sandy beach.
Swimming – I like swimming
Motorboat – We went on a motorboat
Crabs – People eat crabs as seafood
Sand – Children play on the sand
Cavity – There are cavities on the beach

C. Fill in the blanks with words that convey the correct meaning of the sentences.

1. Tiny hatchlings fall _______ (pray / prey) to many predators.
2. Sea turtles live their (hole/whole) life in the sea.
3. The turtles come ashore only during the _______ (night/knight).
4. The predators follow the _______ (sent / scent) of the turtles to eat their eggs.
5. The female turtles lay eggs and go back to the _______ (see / sea)

Answers:

1. prey
2. whole
3. night
4. scent
5. sea

D. Use the dues and fill In the crossword puzzle.

1. This word rhymes with seen.
2. This animal has two horns and a spotted coat.
3. This is a huge sea animal.
4. Sounds like hair
5. Shines brightly
6. Rhymes with load

Answer:

Listening

E. Listen to the flash news. Read the questions given below, then listen to the flash news again and complete the responses.

Answer:

Speaking

F. Look at the picture. Work in groups and give a short Wk about it using the words given below.

Good morning to one and all. I am going to speak about the Students’ Sea Turtle Conservation Network and its activities. This voluntary group protects the Olive Ridley turtles. The boys collect many eggs and incubate in a hatchery. Thus they enjoy doing this service. As soon as the hatchlings come out, they safely take them in a basket of sand. After that they leave them near the sea at night. The little turtles rush into the sea waves. However, rough sea conditions affect the turtles.

Grammar

G. Make meaningful sentences from the table given below.

A turtle – is huge.
– has flippers to swim.

Turtles – live in the sea.
– have a connection with the land.
– are found in coastal waters.
– are wonderful creatures.

H. Write a suitable sentence for the pictures given below.

Answer:

I. Match the two halves of the sentences and read them.

1. Sea turtles – a. threaten the survival of sea turtles.
2. Hatchlings – b. uses its front flippers to swim.
3. A turtle – c. come ashore to lay eggs.
4. Many factors – a. cut open the leathery eggshell.

Answer:

1. c
2. d
3. b
4. a

Writing

J. Tortoises and Turtles are not the same. Read the facts given below.
List the similarities and differences between them.

Answer:

K. Write a paragraph from the contents of the table given above. Frame sentences with these words – but as well as, whereas.
eg. A turtle, as well as a tortoise, belongs to the reptile family.
Answer:
A turtle as well as a tortoise belongs to the reptile family. A tortoise is a land animal whereas a turtle is a sea animal. Both a tortoise and a turtle lives long for many years. A tortoise uses its tiny feet to walk but a turtle uses flippers to swim. A tortoise feeds on grass, weeds, and flowers but a turtle eats insects and bugs.

Creative Writing

L. Describe the picture in about fifty words and give a suitable title. Make use of the words/phrases given below.

Answer:
There are many sea animals in the ocean. They are beautiful and wonderful in varied sizes, shapes, and structures. The fishes are in different colours and are of different varieties. Many rare species of fishes are found in the deep sea. Most corals and exotic species are under the sea.

Sea Turtles Additional Questions

I. Select the Suitable Synonyms.

1. entire
(a) small
(b) partial
(c) whole
Answer:
(c) whole

2. huge
(a) large
(b) little
(c) dwarfed
Answer
(a) large

3. connection
(a) separation
(b) link
(c) division
Answer.
(b) link

4. extremely
(a) majorly
(b) initially
(c) slowly
Answer
(a) majorly

5. commonly
(a) individually
(b) usually
(c) urgently
Answer:
(b) usually

6. haul
(a) pull force
(b) push force
(c) twist force
Answer:
(a) pull force

7. slash
(a) join
(b) cut
(c) merge
Answer:
(b) cut

8. emerge
(a) disperse
(b) submerge
(c) come out
Answer:
(c) come out

9. camouflage
(a) seek
(b) colour
(c) hide
Answer:
(c) hide

10. scent
(a) stink
(b) perfume
(c) heat
Answer
(b) perfume

11. aspect
(a) characteristic
(b) respect
(c) perfect
Answer
(a) characteristic

12. prey
(a) winner
(b) victim
(c) survivor
Answer:
(b) victim

13. tiny
(a) large
(b) huge
(c) small
Answer:.
(c) small

14. estimate
(a) calculate
(b) exact
(c) appropriate
Answer:
(a) calculate

15. adult
(a) young
(b) pre-mature
(c) matured
Answer:
(c) matured

16. survive
(a) die
(b) exist
(c) kill
Answer:
(b) exist

17. fascinating
(a) interesting
(b) surprising
(c) enjoying
Answer:
(a) interesting

18. mystery
(a) interesting
(b) story
(c) puzzle
Answer
(c) puzzle

19. wonderful
(a) amazing
(b) ordinary
(c) casual
Answer:
(a) amazing

20. accidentally
(a) wantedly
(b) deliberately
(c) unintentionally
Answer:
(c) unintentionally

21. construction
(a) destruction
(b) creation
(c) confusion
Answer:
(b) creation

II. Select the Suitable Antonyms.

1. entire
(a) absolute
(b) integral
(c) partial
Answer:
(c) partial

2. largest
(a) biggest
(b) smallest
(c) tallest
Answer:
(b) smallest

3. commonly
(a) rarely
(b) frequently
(c) regularly
Answer:
(a) rarely

4. after
(a) later
(b) next
(c) before
Answer:
(c) before

5. life
(a) soul
(b) death
(c) spirit
Answer:
(b) depth

6. tiny
(a) big
(b) small
(c) little
Answer:
(a) big

7. predators
(a) hunters
(b) killers
(c) rescuers
Answer:
(c) rescuers

8. cavity
(a) crater
(b) bulge
(c) dent
Answer:
(b) bulge

9. camouflage
(a) expose
(b) mask
(c) cover
Answer:
(a) expose

10. scent
(a) aroma
(b) fragrance
(c) stink
Answer:
(c) stink

11. emerge
(a) arise
(b) submerge
(c) appear
Answer:
(b) submerge

12. haul
(a) push
(b) lift
(c) pull
Answer:
(a) push

13. natural
(a) normal
(b) common
(c) artificial
Answer:
(c) artificial

14. accidentally
(a) unintentionally
(b) deliberately
(c) unwittingly
Answer:
(b) deliberately

15. sadly
(a) happily
(b) gloomily
(c) cheerlessly
Answer:
(a) happily

16. interested
(a) keen
(b) concerned
(c) uninterested
Answer:
(c) uninterested

17. conservation
(a) preservation
(b) depletion
(c) control
Answer:
(b) depletion

18. famous
(a) infamous
(b) acclaimed
(c) eminent
Answer:
(a) infamous

19. estimate
(a) guess
(b) appraise
(c) exact
Answer:
(c) exact

20. own
(a) possess
(b) rent
(c) dominate
Answer:
(b) rent

21. adult
(a) juvenile
(b) grown-up
(c) mature
Answer:
(a) juvenile

III. State True or False.

1. Turtles and tortoises are the same. [False]
2. The Leatherback is the largest sea turtle. [True]
3. Jackals, dogs, and pigs will not eat the eggs of Olive Ridley. [False]
4. Crabs and birds will eat the tiny hatchlings. [True]
5. Human activities have put the turtles in grave danger. [True]

IV. Fill in the Blanks Using the Homophones.

1. The eggs are left to incubate under the warmth of the _______ (sun/son).
2. Most of us have _______ (scene/seen) a tortoise in a zoo or a reptile park.
3. This is _______ (quiet/quite) a problem for female Olive Ridleys for moving on land.
4. Human activities during the _______ (lost/last) few decades have put sea turtles in grave danger.
5. The Olive Ridley weighs up to 35 kg when fully _______ (grown/groan).

Answers:

1. sun
2. seen
3. quite
4. last
5. grown

V. Choose the Correct Answers (mcq).

Question 1.
The hatchlings open the eggshell using their _______
(a) egg-tooth
(b) flippers
(c) body
Answer:
(a) egg-tooth

Question 2.
It is estimated by scientists that only one in every _______ hatchlings become an adult
(a) 5000
(b) 1000
(c) 500
Answer:
(b) 1000

Question 3.
Female hatchlings that have become adults _______
(a) find a new beach to lay their eggs
(b) return to the same beach to lay their eggs
(c) lay their eggs in the ocean
Answer:
(b) return to the same beach to lay their eggs

Question 4.
Sea Turtles are _______ species
(a) endangered
(b) out of danger
(c) extinct
Answer:
(a) endangered

Question 5.
The only way to solve the problems faced by Sea Turtles is _______
(a) to not allow the sea turtles to come ashore
(b) to systematically tackle the problems and removing threats
(c) to dig the eggs laid onshore and put them back into the sea.
Answer:
(b) to systematically tackle the problems and removing threats

VI. Very short Answer Questions.

Question 1.
Where do the reptiles spend, almost their entire life?
Answer:
Ammamma asked the children to sit upstairs in the middle room and gave. The Reptiles spend almost their entire life in the sea.

Question 2.
How many species of marine or sea turtles are there?
Answer:
There are seven species of marine or sea turtles in the world.

Question 3.
Name the five sea-turtles found in India’s coastal waters.
Answer:
The Oliver Ridley, the Hawksbill, the Green sea turtle, the Loggerhead, and the Leatherback.

Question 4.
Where do they go to lay eggs?
Answer:
They must come ashore to lay their eggs.

Question 5.
How much does an Olive Ridley weigh?
Answer:
It weighs up to 35kg when fully grown.

VII. Short Answer Questions.

Question 1.
How do the local people jackals and domestic dogs identify the turtle’s eggs?
Answer:
Jackals, domestic dogs and pigs dig up and eat the eggs by following the scent left by the turtle. Even the local people follow the tracks of the turtle to its nest and collect the eggs for eating.

Question 2.
What happens to the eggs, that escape front the people and predators?
Answer:
The eggs that escape from the people and predators hatch 45 – 60 days later. The hatchlings slash open the leathery eggshell with the help of a tiny egg – tooth.

Question 3.
How do the hatchlings read) the shore?
Answer:
When most of the eggs have hatched, the hatchlings push themselves upwards through the sand and emerge on the surface of the beach. From there, they make a hurried dash to the sea.

Question 4.
Where does nesting take place?
Answer:
Mass nesting takes place on the shore. Odisha is one of the only three places in the world, where a phenomenon known as mass nesting or Arribada takes place. Thousands of female turtles come ashore simultaneously to lay their eggs on particular beaches.

Question 5.
How can we ensure that the sea turtles will continue to exist in die year to come?
Answer:
Only by systematically tackling the problems faced by the sea turtles and removing the threats subjected to them, can we ensure that sea turtles will continue to exist in the years to come.

VIII. Paragraph Questions.

Question 1.
What problems are faced by the female turtles, when they come ashore to lay their eggs?
Answer:
Between the months of January and March, female Olive Ridleys come ashore at night to lay their eggs. This is quite a problem for them, as a turtle’s front flippers enable it to swim gracefully and effortlessly, but are not very useful for moving on land. The turtle has to haul itself laboriously onto the beach. Then it chooses a spot well away from the high tide line. There, it scoops out a nest cavity, 45 cms deep, into which it lays about 100 eggs. Then it fills the cavity and hides the nest with the sand. Finally, it returns to the sea, leaving the eggs to incubate under the warmth of the sun.

Question 2.
Describe one of the many mysteries of these fascinating reptiles
Answer:
After many years of swimming in the open ocean, the female hatchlings that have become adults return to the same beach, they were bom. They come there to lay their own eggs. How they manage to find the place after so many years in the sea is one of the many mysteries of these fascinating reptiles. It is also a wonder that they have survived natural dangers for millions of years.

Question 3.
What are the problems that affect the survival of turtles?
Answer:
People hunt the sea turtles for their meat. They collect their eggs. Sometimes the turtles are trapped in the nets of motorboats. Pollution and the dumping of plastics into the ocean affect their survival. Construction activities on nestling beaches also hurt their survival.

Picto Grammar

Subjects and Predicate

Identify the subject and the predicate in the following sentences.

Question 1.
The sun was shining brightly.
Answer:
The sun (subject) / was shining brightly (predicate).

Question 2.
The dogs were barking loudly.
Answer:
The dogs (subject) / were barking loudly (predicate).

Question 3.
The pretty girl was wearing a blue frock.
Answer:
The pretty girl (subject) / was wearing a blue frock (predicate).

Question 4.
My younger brother serves in the army.
Answer:
My younger brother (subject) / serves in the army (predicate).

Question 5.
The man and his wife were working in their garden.
Answer:
The man and his wife (subject) / were working in their garden (predicate).

Question 6.
My mother and my aunt are trained, classical dancers.
Answer:
My mother and my aunt (subject) / are trained classical dancers (predicate).

Question 7.
You don’t have to wait for me.
Answer:
You (subject) / don’t have to wait for me (predicate).

Question 8.
We will no longer tolerate this.
Answer:
We (subject) / will no longer tolerate this (predicate).

Question 9.
The little tree was covered with needles instead of leaves.
Answer:
The little tree (subject) / was covered with needles instead of leaves (predicate).

Question 10.
A rich merchant was passing by the shoemaker’s window.
Answer:
A rich merchant (subject) /was passing by the shoemaker’s window (predicate).

For each sentence given below, underline the subject once and the predicate twice.

Example: John went to the movies with his friends.
Answer:
John went to the movies with his friends.

1. The horse appeared at the starting line.
Answer:
The horse appeared at the starting line.

2. The student arrived late to class because he woke up late.
Answer:
The student arrived late to class because he woke up late.

3. John looked out of the window to check the sky.
Answer:
John looked out of the window to check the sky.

4. The audience grew very restless waiting for the play to start.
Answer:
The audience grew very restless waiting for the play to start.

5. The air in the classroom smelled fresh.
Answer:
The air in the classroom smelled fresh.

6. I felt exhausted from the anticipation.
Answer:
I felt exhausted from the anticipation.

7. The owners grew flowers all around their house.
Answer:
The owners grew flowers all around their house.

Underline the simple subjects In the following sentences.

1. I want a new car.
Answer:
I want a new car.

2. James is nice.
Answer:
James is nice.

3. The sun is moving.
Answer:
The sun is moving.

4. Max wrote the letter.
Answer:
Max wrote the letter.

5. The letter was written by Max.
Answer:
The letter was written by Max.

The simple predicate is the main verb in the sentence.

Example: Mary plays the piano.
Answer:
Plays the piano.
In this example, the verb phrase “plays the piano” is the predicate.

Example: Josephine is having a nice day.
In this example, the verb phrase “is having a nice day” is the predicate.

Underline the simple predicates in the following sentences.

1. I run with my dog.
Answer:
I run with my dog.

2. We made a cake.
Answer:
We made a cake.

3. The cake was made by us.
Answer:
The cake was made by us.

4. Jessica and Rebecca are playing the piano and singing.
Answer:
Jessica and Rebecca are playing the piano and singing.

5. We will be running in the race this Sunday.
Answer:
We will be running in the race this Sunday.

Underline the simple subjects and draw a box around the simple predicates In the following sentences.

Example: Elise is going to sing at the concert tomorrow

1. The dentist charges $6200 for an office visit.
Answer:
The dentist charges $6200 for an offce visit.

2. The baby weighed 7.2 pounds at birth.
Answer:
The baby weighed 7.2 pounds at birth.

3. We need to make a new plan.
Answer:
We need to make a new plan.

4. I want to go to the concert, but I don’t have enough money.
Answer:
I want to go to the concert, but I don’t have enough money

5. My friend and I are going to the movies tonight.
Answer:
My friend and I are going to the movies tonight.

Now try to write three complete sentences of your own.
Try to underline the simple subjects and circle the simple predicates.

Choose a subject from the box to complete each sentence.

A big spider, A buzzing bee, My notebook, A gray dolphin, My mother, My closet, The houseplant, The eye doctor, The space alien

1. _________ looked for nectar in the flower.
2. _________ has lots of clothes in it.
3. _________ checked my vision.
4. _________ needs soil, water, and sunlight.
5. _________ landed the UFO.
6. _________ jumped in the sea.
7. _________ was upset because I broke her favorite vase.
8. _________ is filled with stories that I wrote.
9. _________ spun a web in the doorway.

Answers:

1. A buzzing bee
2. My closet
3. The eye doctor
4. The houseplant
5. The space alien
6. A gray dolphin
7. My mother
8. My notebook
9. A big spider

Choose a predicate from the box to complete each sentence.

watered her flowers, barked all night long, drove me to school, blew in the wind, ate crickets, cut the boy’s hair, fixed the sink, slept in her crib, flew the airplane.

1. The gardener _________
2. The pilot _________
3. The little puppy _________
4. The barber _________
5. James’ baby sister _________
6. The flag _________
7. The lizard _________
8. The plumber _________
9. The bus driver _________

Answers:

1. watered her flowers
2. flew the airplane
3. barked all night long
4. cut the boy’s hair
5. slept in her crib
6. blew in the wind
7. ate crickets
8. fixed the sink
9. drove me to school

Creative Writing

I. Make sentence of your own

1. Beach
2. Breeze
3. Swimming
Answer:
1. We like to play on the sandy beach.
2. The trees swayed in the breeze.
3. I like swimming.

II. Picture Composition:

Question 1.
Describe the picture in about fifty words and give a suitable title. Make use of the words/phrases given below.
children
playing park
boy
hand in hand
colourful
flowers wheel
girls
performed

Answer:
Theme park
There are children playing in a theme park. Two girls are playing by the swing each hand in hand. A boy is playing with a colourful boy. Some children are playing on the giant wheel. A circus show is also being performed there. The park is full of trees and flowers.

Question 2.
Describe the picture in about fifty words and give a suitable title. Make use of the words/phrases given below.
activities
classroom
student
building
discussing
Everyone
useful
answers
skit

Answer:
Drawing Class
These children are doing various activities with enthusiasm outside their classroom. A student is drawing and two other students are playing with the building blocks. Three children are enacting a skit. There are four children sitting and discussing their activity. Everyone is busy doing something useful answers.

Question 3.
Describe the picture in about fifty words and give a suitable title. Make use of the words/phrases given below.
monkey
picture
entrance
snakes
people
animals
welcome
bears
lions

Answer:
Zoo
This is a zoo. There are plenty of animals seen in the picture. I can see monkeys, elephants, lions, rabbits, giraffes, snakes, bears, tigers, and birds. They are all at the entrance of the zoo. I can see some animals on top of the board ‘zoo’. It seems that they are all ready to welcome the people, who visit the zoo.

Question 4.
Describe the picture in about fifty words and give a suitable title. Make use of the words/phrases given below.
bird
nest
hungry
mother
food
sitting
near

Answer:
Nest
I see a bird and two nestlings in the picture. The nestlings are seemed to be hungry. The mother bird has fetched some food. It is sitting near the nestlings. The nestlings eagerly open their beaks for the food.

Sea Turtles Summary

Section I

This lesson is about Sea Turtles which are different from Tortoise that we see in a zoo or a reptile park. There are seven species of sea turtles -out of which five are seen in India – the Olive Ridley, the Hawksbill, the Green Sea Turtle, the Loggerhead, and the Leatherback. The turtles are huge and weigh between 35 kg and 700 kg. The largest sea turtle is the Leatherback which is 2.2m long and 700 kg in weight. Sea turtles come to the shore to lay their eggs. Except for Olive Ridleys, other species have become rare in India. Mass Nesting or Arribada is a phenomenon that occurs in Odisha and other two places in the world where Olive Ridleys come ashore alone to lay their eggs.

Section II

Between January and March, female Olive Ridleys come ashore and haul (pull with force) using their front flippers onto the beach. They choose a spot away from the high tide and dig 45 cm into which they lay their eggs. They lay about 100 eggs at one time. After covering the nest with sand it returns to the sea. The eggs are left to incubate under the sun. People collect these eggs for eating. Jackals, domestic dogs, and pigs eat the eggs. After escaping from the predators, the hatchlings (little ones) come out of the eggshell with the help of an egg-tooth. After they come out they make a dash into the sea.

Section III

Weighing less than 20 grams, many of these hatchlings fall prey to crabs or birds before they reach the sea. It is estimated that one in a thousand hatchlings become an adult. After swimming for years in the sea, the adult female returns to the same beach where they were born which is an unsolved mystery. Human activities have endangered the survival of sea turtles. Problems like pollution, the dumping of plastics into the ocean, and the construction activities on nesting beaches endanger their survival. We have to tackle these problems to save the sea turtles.

You can Download Samacheer Kalvi 6th Science Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 3 Matter Around Us

Samacheer Kalvi 6th Science Matter Around Us Textual Evaluation

I. Choose the appropriate answer.

Question 1.
_____ is not made of matter.
(a) gold ring
(b) iron nail
(c) light ray
(d) oil drop
Answer:
(c) light ray

Question 2.
200 ml of water is poured into a bowl of 400 ml capacity. The volume of water now will be
(a) 400 ml
(b) 600 ml
(c) 200 ml
(d) 800 ml
Answer:
(c) 200 ml

Question 3.
Seeds from water-melon can be removed by _____ method.
(a) hand-picking
(b) filtration
(c) magnetic separation
(d) decantation
Answer:
(a) hand-picking

Question 4.
Lighter impurities like dust when mixed with rice or pulses can be removed by
(a) filtration
(b) sedimentation
(c) decantation
(d) winnowing
Answer:
(d) winnowing

Question 5.
_____ is essential to perform winnowing activity.
(a) Rain
(b) Soil
(c) Water
(d) Air
Answer:
(d) Air

Question 6.
The filtration method is effective in separating a mixture
(a) Solid-solid
(b) Solid-liquid
(c) liquid-liquid
(d) liquid-gas
Answer:
(b) Solid-Liquid

Question 7.
From the following, _____ is not a mixture.
(a) coffee with milk
(b) lemon juice
(c) water
(d) ice cream embedded with nuts
Answer:
(c) water

II. True or False. If False, give the correct statement.

Question 1.
Air is not compressible.
Answer:
False. Air is highly compressible.

Question 2.
Liquids have no fixed volume but have a fixed shape.
Answer:
False. Liquids have fixed volume but have no fixed shape.

Question 3.
Particles in solids are free to move.
Answer:
False. Particles of solid can not move freely (or) Particles of liquid are free to move.

Question 4.
When pulses are washed with water before cooking, the water is separated from them by the process of filtration.
Answer:
False. When pulses are washed with water before cooking the water is separated from them by the process of decantation.

Question 5.
Strainer is a kind of sieve which is used to separate a liquid from a solid.
Answer:
True.

Question 6.
Grain and husk can be separated by winnowing.
Answer:
True.

Question 7.
Air is a pure substance.
Answer:
False. Air is a mixture of gases.

Question 8.
Butter from curds is separated by sedimentation.
Answer:
False. Butter from curd is separated by Churning.

III. Match the following.

(a)

Answer:

(b)

Answer:

IV. Fill In the blanks.

1. Matter is made up of ______
2. In solids, the space between the particles is less than in ______
3. Grains can be separated from their stalks by ______
4. Chilies are removed from ‘upma’ by the ______ method.
5. The method employed to separate clay particles from water is ______
6. Among the following items: safety pins, pencil and rubber band, ______ will get attracted to a magnet.
7. Water obtained from tube wells is usually ______ water.

Answers:

1. atoms
2. liquids and gases
3. Threshing
4. handpicking
5. Filtration
6. Safety pins
7. Impure

V. Complete the given analogy.

1. Solid: rigidit :: gas: ______
2. Large Inter-particle space: gas:: ______ :solid
3. Solid: definite shape :: ______ : shape of the vessel.
4. Husk-grains: winnowing:: Sawdust-Chalk piece : ______
5. Murukku from hot oil: ______ : coffee powder residue from decoction: ______
6. Iron – sulphur mixture : ______ :: Mustard seeds from Urad-dhal: rolling

Answers:

1. Flexibility.
2. Little inter-particle space.
3. Liquid.
4. Filtration
5. Filtration
6. Magnetic separation.

VI. Give a very short answer.

Question 1.
Define the term matter?
Answer:
Matter is defined as anything which occupies space and has mass.

Question 2.
How can husk or fine dust particles be separated from rice before cooking?

1. The husk or fine dust particles can be separated from rice by washing the rice with water before cooking.
2. The lighter impurities float while heavier rice grains sink to the bottom. (It is sedimentation).
3. Then the water with the impurities is carefully poured away by decantation, leaving clean rice at the bottom.

Question 3.
Why do we separate mixtures?
Answer:
We separate mixtures:

1. to remove impurities or harmful components (eg: stones from rice),
2. to separate useful component from other components (eg: petrol from petroleum)
3. to obtain a substance in highly pure form (eg: gold from gold mines).

Question 4.
Give an example for mixture and justify your answer with reason.
Answer:
Milk is an example for the mixture.
It contains water, fat, protein etc. Since two or more compounds are mixed in a physical combination, milk is a mixture.

Question 5.
Define sedimentation?
Answer:
The settling down of a heavier component of a mixture, when allowed to remain undisturbed for some time, is called sedimentation.

Question 6.
Give the main difference between a pure substance and an impure substance.
Answer:
Pure substance:

1. It is made up of only one kind of particles
2. Unadulterated

Impure substance:

1. It is made up of two or more toxic particles
2. Adulterated

VII. Give a short answer :

Question 1.
A rubber ball changes its shape on pressing. Can it be called a solid?
Answer:
Yes, It has a definite shape and volume. Its particles cannot move freely. It confirms the solid properties.

Question 2.
Why do gases not have fixed shape?
Answer:

1. Gases possess more intermolecular space and less forces of attraction.
2. They can move freely at any direction.
3. They have the property of filling the entire part of a container by taking the shape of the container.

So, gases do not have fixed shape.

Question 3.
What method will you employ to separate cheese (Paneer) from milk? Explain.
Answer:
Filtration:

1. Heat the milk
2. Add lime Juice or vinegar after few minutes
3. Cheese will float on the liquid
4. Use strainer to separate the cheese (paneer) from milk.

Question 4.
Look at the picture given below and explain the method of separation illustrated.

Answer:
The method is called as Sieving. It is used to separate solid particles of different sizes. Ex. bran from flour.

Question 5.
How can you separate a mixture of a large number of tiny bits of paper mixed with pulses/dal?
Answer:
Bits of paper are separated from pulses/dal by winnowing. Bits of paper have less weight and get easily blown away by the wind. The pulses/dal are heavier particles and will fall down closer.

Question 6.
What is meant by food adulteration?
Answer:
Food adulteration is the process in which the quality of food is lowered either by the addition of inferior quality material or by extraction of valuable ingredients.

Question 7.
Mr. Raghu returns home on a hot summer day and wants to have buttermilk. Mrs. Raghu has only curds. What can she do to get buttermilk? Explain
Answer:
Method to prepare buttermilk from curd:

1. Using a hand chumer, the curd has to be blended well.
2. Two cups of chilled water are to be added after churning the curd.
3. The water is to be mixed well so there are no lumps.
4. Ingredients, such as chaat masala shall be added before serving the buttermilk.

VIII. Question based on Higher Order Thinking Skills.

Question 1.
Distinguish between properties of Solid, liquid, gas. Draw a suitable diagram.
Answer:

Question 2.
Using a suitable apparatus from your laboratory separate the mixture of chalk powder, mustard oil, water, and coins. Draw a flow chart to show the separation process.
Answer:

Question 1.
Malar’s mother was preparing to cook dinner. She accidentally mixed ground nuts with urad-dhal. Suggest a suitable method to separate the two substances so that Malar can have ground nuts to eat.
Answer:

1. Separation of groundnuts and Urad-dhal.
2. Wire mesh as a strainer sieve is used to separate ground nuts and Urad-dhal. Because both are solids of different sizes.

Question 2.
In a glass containing some water, tamarind juice and sugar is added and stirred well. Is this a mixture can you tell why? Will this solution be sweet? or sour? or both sweet and sour?
Answer:
Yes. It is a mixture. It has more than one kind of particle, i.e. Tamarind, Water, and Sugar are mixed together. This solution will be sweet and sour.

Question 3.
Justify your answer.

The arrangement of particles in three different phases of matter is shown above.
(a) Which state is represented by fig. 1?
(b) In which will be the interparticle attraction maximum?
(c) Which one of them cannot be contained in an open vessel?
(d) Which one can take the shape of its container?
Answer:
(a) Liquid state, is represented by Fig 1.
(b) In Fig. 3 the interparticle attraction will be maximum because it is in a solid-state.
(c) Fig. 2 cannot be contained in an open vessel, as it is in the gaseous state.
(d) Fig. 1 can take the shape of its container, as it is in the liquid state.

IX. Life Skills-Debate

Question 1.
Debate on “Food adulteration and detection”.
Answer:
Food is a basic requirement for life. It should be pure, nutritious, and free from any type of adulteration.

Adulteration :
Sometimes, things that we buy in the market are mixed with harmful and unwanted substances. Food can also get adulterated due to carelessness or lack of proper handling. It will not possible to check for adulteration on visual examination. Following tests will help even a layman or non-technical person to detect adulterants in some of the products.

Detection:
Milk: Adulterants used can be water, starch, urea, sucrose, detergents, neutralizer, formalin etc. These adulterants are used to increase the thickness, viscosity, and shelf life of milk.

Test: Put a drop of milk on a polished vertical surface. The drop of pure milk either stops or flows slowly leaving a white trail behind it. Whereas milk adulterated with water will flow immediately without leaving a mark. We can also use Lactometer for measuring the specific density of milk.

Sugar: Adulterant: Chalk

Test: Dissolve sugar in a glass of water, chalk will settle down at the bottom

Ice Cream: Adulterant: washing Powder

Test: Put some lemon juice on ice-cream, bubbles come out in the presence of washing powder

Test: Take one teaspoonful of melted ghee or butter with an equal quantity of cone. Hydrochloric acid in a test tube and add to it a pinch of cane sugar. Shake well for one minute and let it stand for five minutes. The appearance of crimson colour in the lower layer shows the presence of vanaspati.

We must be careful about the common adulterants in our food. We might be eating a dangerous dye, sawdust, industrial starch, or other contaminated foods which are a major source of diseases. And thus, we invite diseases rather than good health. Food adulteration is basically lowering the quality of food. So, we must be aware of such adulteration.

XI. Sequence Type

Question 1.
Write the sequence of steps you would use for making tea.
Use the words : mixture, dissolve, filtrate and residue.
Answer:

1. Take Tea powder and Milk
2. Heat the milk, then add tea powder.
3. Add sugar to taste and, Stir well.
4. The sugar will be dissolved in the mixture.
5. Filter the mixture. Tea (filtrate) flows down through filter paper.
6. Tea leaves settle as residue on the filter paper.

XII. Topic enrichment – Project.

Question 1.
Make a fruit or vegetable salad. Give reasons why you think it is a mixture.
Answer:
Fruit Salad:
Discard the skin of a banana, papaya, orange, apple, pineapple, guava, and make small slices. Add pomegranate and grapes. Then mix with cream milk and honey. Now the fruit salad is ready. As this Fruit Salad is a physical combination of two or more substances, it is a mixture.

Vegetable Salad:
It is prepared with the primary ingredients of tomato, cucumber, onion, carrot, mint, lemon juice, and dried chili peppers. As this Vegetable Salad is a physical combination of two or more substances, it is a mixture.

Question 2.
Connect with sports
Air is not a pure substance. It helps us in many ways from breathing to playing. Balloon sports are very popular sport. The basis of how the balloon works are that hot air is lighter than cool air. which makes the balloon rise up Find out more about Hot Air balloons.

Answer:
The hot air balloon consists of three parts: an envelope- which contains heated air, a basket, and a burner system which creates an open flame by burning a mix of liquid propane and air.

The basic principle behind hot air balloons is the use of hot air to create buoyancy, which generates lift.

Hot air weighs less than the same volume of cold air, because it is less dense. It means that hot air will rise up and float when there is cold air around it.

Nowadays, most hot air balloons are made of nylon. The melting point of this material is approximately 230° C. The temperature inside a hot air balloon is usually kept below 120° C.

Hot air balloon festivals are held annually in many places throughout the year, allowing hot air balloon operators to gather- as well as for the general public to participate in various activities.

Hot air balloon flights are not possible in the rain. This is because the heat inside of the balloon can bring rain to boiling temperatures on top of the balloon, thereby destroying hot air balloon fabric.

Samacheer Kalvi 6th Science Matter Around Us Intext Activities

Activity 1

Take a few crystals of sugar. Observe them carefully with the help of a magnifying lens.

Which of the shapes given above resembles a sugar crystal?
A B C D E F
Answer:
D
Now place a few sugar crystals in a teaspoon full of water. What happens to the sugar crystals?

A sugar crystal is also made up of molecules. When sugar dissolves in water, the sugar crystals break down and the molecules of sugar get distributed in water. This makes water sweet to taste. The sugar molecules are extremely small, that is why we are not able to see them. Small amount of matter has nfany millions of molecules in it. (1 million =10 lakhs).

Activity 2
Sit together in groups of three. Look at objects given below. Are they familiar to you? Are they same or different? On what basis did you group them? Is there only one way of doing it or more ways? Discuss with your group members and note it down.

Answer:
There are various objects. There are many ways to group them. For example,
Pencil & books – Used for Studying
Bucket and comb – Made of Plastic
Table and ladle – Made of Wood
Glass of water and spectacles – Light can pass through
Apple and iron box – Light cannot pass through
Cow and bird – Living things
Feathers and paper cup – Will float in water
Apple or piece of stone – Will sink in water
Scrub brush and broom – Rough

Try to fill in the following table.
Answer:
Things that float:

1. Feathers
2. Plastic Comb
3. Paper cups

Things that sink:

1. Glass
2. Piece of stone
3. Apple

Activity 3

Work in a group of two. Malar was asked to group some items based on their physical states. This was the table she made. Do you agree with her? Correct the table if you do not agree and submit it to your teacher.

Answer:

Activity 4

Question 1.
Lift an uninflated cycle tube. Inflate it and lift it again. Is there a change in the weight? Can we see that air has mass?
Answer:
The weight of the inflated cycle tube is more than the weight of the uninflated cycle tube. So we can say that air is also matter though we cannot see, it occupies and also has mass.

Test Yourself

1. Name an object which is brittle and transparent ______
2. Name an object which can be stretched ______
3. Name two objects which can be bent ______

Answer:

1. Glass
2. Rubber band
3. Feather, Paper cup

Activity 5

Let us take two sachets of juice. In both the sachets, it is written 100ml. Let us empty two sachets and pour the juice into the following glasses.

Question 1.
Does its shape also change? Yes / No

Answer:
Yes.

Question 2.
Does its volume change? when it is poured into a big glass or a small one? Yes / No.
Answer:
No.

Question 3.
How will you find out whether the volume has changed or not?
Answer:
With the help of a graduated beaker, we can find out whether the volume has changed or not.

A liquid needs a container and takes the shape of a container because the particles slide past one another and keep moving. The amount of juice is the same in both glasses. The volume of a liquid remains the same whether it is kept in a large container or a small one but its shape changes.

Try it yourself.

Identify the mixture the table given below. Write “yes” for mixture and no if it is not a mixture. You may also write “I do not know” and later discuss with your teacher.

Answer:

Activity 6

Think and find out, is it a good idea to separate the bran from flour?
Answer:
No. It is not a good idea to separate bran from flour. Because, Bran is rich in dietary fiber, and essential fatty acids. It contains significant quantities of starch, protein, vitamins. It is also a source of phytic acid. In foreign countries, it is used as a nutrient and production of oils.

Activity 7

Group Activity – Students are divided into 4 groups

Each group should suggest a method to separate mixtures and also give reasons why they used a particular method and what property of the components forms the basis for separation. Examples should be drawn from day-to-day life. After the group presents its method to the rest of the class, the whole class will discuss and analyse if the suggested method will work and then make a note of it in the form given below:

Answer:

Activity 8
Collect and share information on common adulterants and their detection in foodstuff in the class. Watch the youtube video: 10 simple tricks to find adulterated food, https://www.youtube.com/watch? v=_XLi WunnudY
Answer:
(i) Argemone seed in the mustard seed.
Argemone seed is crushed with a hammer its cotyledon is white in colour.
Mustard seed is crushed with a hammer its cotyledon is yellow in colour.

(iv) Tea Powder
Adultered tea powder – add water: The water is changed in red colour
Original tea powder – add water: The watercolor will be yellow

(v) Chill Powder
Adultered Chilli povder – add water: The colour of the water is changed to red colour
Good quality chilli powder – add water: The colour of the water will be yellow.

(vi) Adulterated Turmeric powder is added with HCl. The mixture is red in colour then add water. No change.

Original Turmeric power is added with HCl. The mixture is red in colour then add water. The red colour is changed into colourless.

Samacheer Kalvi 6th Science Matter Around Us Additional Questions

I. Choose the correct answer.

Question 1.
All the matter made of ______
(a) Particles
(b) Atoms
(c) Elements
(d) Mixture
Answer:
(b) Atoms

Question 2.
Intermolecular forces of attractions are maximum in
(a) liquids
(b) plasma particles
(c) solids
(d) gases
Answer:
(c) solids

Question 3.
A drop of water contains about ______ water particles.
(a) 1021
(b) 1012
(c) 1022
(d) 1020
Answer:
(a) 1021

Question 4.
The method of separating substances based on size, color, and shape is called
(a) Hand-picking
(b) Winnowing
(c) Threshing
(d) sieving.
Answer:
(a) Hand-picking

Question 5.
has definite shape and volume.
(a) Solid
(b) Liquid
(c) Gas
(d) None
Answer:
(a) Solid

Question 6.
The space between _______ particles is the greatest one.
(a) solid
(b) liquid
(c) gas
(d) cold
Answer:
(c) gas

Question 7.
For removing grains from stalks, the _______ method is used.
(a) Winnowing
(b) Sieving
(c) Churning
(d) Threshing
Answer:
(d) Threshing

Question 8.
Very tiny insoluble solid separated from a liquid is _______
(a) Winnowing
(b) Churning
(c) Sieving
(d) Filtration
Answer:
(b) Churning

Question 9.
_______ is a smallest particle.
(a) Molecule
(b) Element
(c) Atom
(d) Substance
Answer:
(c) Atom

Question 10.
We mix rice, dal, salt, chilies, pepper, ghee, and other ingredients to make Pongal. So Pongal is also a _____
(a) Mixture
(b) Compound
(c) Element
(d) Matter
Answer:
(a) Mixture

II. State whether the following statements are True or False. If false give the correct statement.

Question 1.
Gas like the state of Matter that exists at extremely cold temperatures used in the field of cryogenics.
Answer:
True.

Question 2.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Answer:
False. The particles in the matter are extremely small and cannot be seen even with a powerful microscope.

Question 3.
The Cow and Birds are nonliving things.
Answer:
False. The Cow and Birds are living things.

Question 4.
The feather and paper cup can float on the water.
Answer:
True

Question 5.
The force of attraction between liquid particles is more than solid particles.
Answer:
False. The force of attraction between liquid particles is less than solid particles.

Question 6.
Gases have neither a definite shape nor a definite volume.
Answer:
True.

Question 7.
Water particles have no space between them.
Answer:
False. Water particles have space between them.

Question 8.
Liquid is affected by gravity less than anything.
Answer:
False. Liquid is effected by gravity more than anything.

III. Fill in the blanks.

1. Stars including Sun are covered in _______
2. Tiny particles present in all matter are called as _______
3. A _______ substance is made up of only one kind of particle.
4. The purity of gold is expressed in terms of _______
5. _______ is used to separate gravel from the sand at a construction site.
6. _______ process is done after sedimentation.
7. RO is a process for removing impurities from _______ to make it potable.
8. Turmeric powder is adulterated with a _______ chemical.
9. In most houses people use a commercial water filter to remove impurities and also kill the harmful germ in water using _______
10. The principle used in washing machines to squeeze out dirt from a cloth is called _______
11. _______ is not affected by gravity.
12. An example of a substance to be obtained in highly pure form is _______

Answers:

1. Plasma
2. atoms and molecules
3. pure
4. Carat
5. Wire mesh
6. Decantation
7. Water
8. bright yellow
9. UV-rays
10. centrifugation
11. Gas
12. Gold from gold mines

IV. Complete the Analogy.

1. Bucket: Plastic :: Table : _______
2. Water : Liquid :: Apple : _______
3. Made up of one kind of particles : Pure substance :: Chemical combination of two or more element: _______
4. Mixture containing iron: Magnetic separation:: Muddy water: _______
5. Removal of Harmful germs : UV rays :: Removal of Impurities from water : _______

Answers:

1. Wood
2. Solid
3. Compound
4. Filtration
5. RO process

V. Short Answers.

Question 1.
Mention any two characteristics of the particles of matter.
Answer:

1. Particles of matter have a lot of space in between them.
2. Particles of matter attract each other.

Question 2.
How the matter is grouped on the basis of physical states?
Answer:
Matter can be grouped into three states:

1. Solid
2. Liquid
3. Gas.

Question 3.
What is meant by compound?
Answer:
Compound is the substance formed by the chemical combination of two or more elements.

Question 4.
Define the term ‘Diffusion’.
Answer:
Diffusion is the tendency of particles to spread out in order to occupy the available space.

Question 5.
What is Decantation?
Answer:
After sedimentation, the supernatant liquid is slowly poured out from the container without disturbing the sediment.

Question 6.
How the substance of gaseous particles change to a liquid state?
Answer:
When pressure on a gas is increased, its molecules come closer together, and its temperature is reduced, which removes enough energy to make it change from the gaseous to the liquid state.

Question 7.
Give any two characters of a pure substance.
Answer:

1. A pure substance is made up of only one kind of particle.
2. It may be elements or compounds.

Question 8.
Air is a mixture. Justify.
Answer:
Air contains Oxygen, Nitrogen, Carbon dioxide, Water vapour, Noble gases, etc. So it is a Mixture.

Question 9.
Give the characters a mixture.
Answer:

1. Mixture is an impure substance and contains more than one kind of particle.
2. In the mixture, the components are mixed in any proportion.

Question 10.
What is meant by separation?
Answer:
The process by which the components of the mixture are isolated and removed from each other to get a pure substance is called separation.

Question 11.
What are the steps involved in the separation of sand, salt, and water?
Answer:
Sedimentation, decantation, filtration, evaporation, and condensation.

Question 12.
Give any two examples of adulterated food.
Answer:

1. Used tea leaves are used as adulterants in tea.
2. Small stones are mixed with rice.

VI. Long Answer.

Question 1.
Classify the following based on their physical states.
Stone, Air, Kerosene, LPG, Book, Eraser, Smoke, Coconut oil, Petrol, Cool drinks.
Answer:

Question 2.
Fill up the column B with the correct term, given in the options below: (Sedimentation, Churning, Sieving, Threshing, Filtration)

Answer:

1. Threshing
2. Sieving
3. Filtration
4. Churning
5. Sedimentation

Question 3.
What is Decantation? Explain with Diagram.
Answer:
The water with the impurities is carefully poured away leaving clean rice at the bottom. This is called a decantation.

1. This process is done after sedimentation.
2. The supernatant liquid is slowly poured out from the container without disturbing the sediment.
3. The part that has settled down is called sediment.
4. The water that is obtained after decantation is called the decanoate.
5. The process of removal of water above the sediment is called decantation.
6. But even after decantation, the water is not completely free from fine soil particles.
7. By the process of filtration, we can remove soil particles.

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Intext Questions

Question 1.
Check whether the Tree diagrams are equal or not.

Solution:
(i) Their algebraic expressions are a × (b – c) and (a × b) – (a × c)
∴ distributive property of multiplication over subtraction
∴ They are equal
(ii) Their algebraic expressions are a × (b – c) and (a × b) – c
Both are not equal [By BODMAS rule]

Question 2.
Check whether the following algebraic expressions are equal or not by using Tree diagrams.
(i) (x + y) + z and x + (y + z)
(ii) (p × q) × r and p × (q × r)
(iii) a – (b – c) and (a – b) – c
Solution:
(i) (x + y) + z and x + (y + z)
The tree diagrams are

Subtraction is not associative and the expressions are not equal.
(ii) (p × q) × r and p × (q × r)
The tree diagram is

Multiplication is associative
∴ Both expressions are equal.

(iii) a – (b – c) and (a – b) – c
Their tree diagrams are

Subtraction is not associative
∴ Both expressions are not equal.

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Additional Questions

Question 1.
Draw tree diagrams for the following questions:
(i) The number of books sold in a book fair is as follows. First day 1,82,192, Second day 1,28,194, Third day 80,520 fourth day 92,004 and the fifth day 50,020. Find the total number of the book sold.
(ii) A water purification project cost 1,82,71,000. The machinery was bought for ₹ 69,12,000. What is the amount needed to complete the project?
(iii) The number of flowers needed to arrange in a flower pot is 62. Find the number of flowers needed to arrange in 55 pots?
(iv) If the total scholarship money sanctioned for 50 students are ₹ 62,000. Find the amount that each student can get?
Solution:

Question 2.
Convert into tree diagrams
(i) (10 × 5) + (2 × 16)
(ii) (5 × 3) – (8 × 6) + 9
(iii) [9 + (3 × 2)] – [(6 × 4) + 5]
(iv) [(4 – 1) × 16] + [(16 + 9) × 3]
(v) {[(10 × 6) + 5] × [ 4 + (3 – 2)]} ÷ [4 × (2 + 9)]
(vi) 4 + [8 × 6 + {(4 × 3) – (10 ÷ 4)}]
Solution:

Question 3.
Convert the following tree diagrams into numerical expressions.

Solution:
(a) [4 × (6 + 2)] – [(4 – 2) ÷ 2]
(b) (12 × 6) + (6 ÷ 3)
(c) [4 × (10 – 2)] + [(4 + 9) × 3]

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Ex 5.2

Miscellaneous Practice Problems

Question 1.
Write the missing numbers.

Solution:
(i) 15 × (9 ÷ 3)

(ii) 65 ÷ (9 + 3)

(iii) (8 + 5) – (9 + 2)

Question 2.
Write the missing operations in the trees.

Solution:
(i) 8 + (6 ÷ 2)

(ii) 39 – (6 × 5)

Question 3.
Check whether the Tree diagrams are equal or not.

Solution:
c ÷ (a ÷ b) ≠ a(b ÷ c)

Challenge Problems

Question 4.
Convert the following questions into tree diagrams:
(i) The number of people who visited a library in the last 5 months was 1210, 2100, 2550, 3160 and 3310. Draw the tree diagram of the total number of people who had used the library for the 5 months.
(ii) Ram had a bank deposit of ₹ 7,55,250 and he had withdrawn ₹ 5,34,500 for educational purpose. Find the amount left in his account. Draw a tree diagram for this.
(iii) In a cycle factory, 1,600 bicycles were manufactured on a day. Draw tree diagram to find the number of bicycles produced in 20 days.
(iv) A company with 30 employees decided to distribute ₹ 90,000 as a special bonus equally among its employees. Draw tree diagram to show how much will each receive?
Solution:
(i) People who visited the library for the past 5 months = 1210 + 2100 + 2550 + 3160 + 3310 = 12,330
Total number of people visited = 12,330
Tree Diagram

(ii) Total bank deposit of Ram = ₹ 7,55,250
Amount withdrawn for educational purpose = ₹ 5,34,500
Amount left in his account = ₹ 2,20,750
Amount left in Ram’s Account = ₹ 2,20,750
Tree Diagram

(iii) Number of bicycles manufactured in a day = 1600
Number of bicycles manufactured in 20 days = 1600 × 20 = 32,000
Number of bicycles manufactured in 20 days = 32,000
Tree Diagram

(iv) Total amount distributed to 30 employees = 90,000
Amount received by one employee = \(\frac { 90000 }{ 30 }\) = 3000
Each employee receive Rs. 3,000
Tree Diagram

Question 5.
Write the numerical expression which gives the answer 10 and also convert into a tree diagram.
Solution:
Numerical expression 15 – (3 + 2)
Tree Diagram

Question 6.
Use brackets inappropriate place to the expression 3 × 8 – 5 which gives 19 and convert it into tree diagram for it.
Solution:
Numerical expression (3 × 8) – 5
Tree Diagram

Question 7.
A football team gains 3 and 4 points for successive 2 days and loses 5 points on the third day. Find the total points scored by the team and also represent this in the tree diagram.
Solution:
Total points scored by the team = 3 + 4 – 5 = 2
Tree Diagram

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 3 Perimeter and Area Intext Questions

Activity (Text book Page No. 39)

Question 1.
Observe the following shapes and answer the questions given below.

i) Mark the closed shapes as ‘✓’ and open shapes as ‘✗’
ii) Find the measure of the boundary of closed shapes by using a ruler.
iii) Which closed shape has the shortest boundary?
iv) Which closed shape has the longest boundary?
Activity to be done by the students themselves

Try this (Text book Page No. 40)

Question 1.

Is the perimeter of the given shape possible ? why ?
Solution:
Not possible. Because perimeter is the length of the boundaries of any closed shape. It is not a closed shape.

Try These (Text book Page No.41)

Question 1.
Draw a shape with perimeter 16 cm in a dot sheet.
Solution:

Question 2.
What is the perimeter of a rectangle if the length is twice its breadth?
Solution:
Perimeter of a rectangle = 2(l + b) units
= 2 × (2b + b) units
= 2 × 3b units = 6b units

Perimeter of a rectangle = 6b units.

Question 3.
What would be the perimeter of a square if its side is reduced to half?
Solution:
Let a side of a square = s units.

Question 4.
What is the perimeter of a triangle if all sides are equal in length?
Solution:
Perimeter of a triangle P = sum of its 3 sides.
If all sides are equal, it is an equilateral triangle with side say a.
Perimeter = a + a + a units = 3a units

Activity (Text book Page No. 41)

Question 1.
Choose any five items like Table, A4 sheet, Note-book, etc in the classroom. Guess the approximate length of each side by observation and write down the estimated perimeter of the item. Then, measure by using ruler and record the actual perimeter and find the difference in the following table (to the nearest cm)

Solution:
Activity to be done by the students themselves

Try this (Text book Page No. 42)

Question 1.

Can different shapes have the same perimeter
Solution:
Yes, different shapes can have the same perimeter.

Try These (Text book Page No. 43)

Question 1.
Find the breadth of the rectangle with perimeter 14 m and length 4 m.
Solution:
Given perimeter of the rectangle P = 14 m
length l = 4 m

Question 2.
The perimeter of an isosceles triangle is 21 cm. Find the measure of equal sides given that the third side is 5 cm.
Solution:
Perimeter of the triangle P = (a + b + c) units.
21 = [(a + b) + 5] cm
21 – 5 = a + b
16 = a + b
Here a and b are equal sides and let a = b
16 = a + a
2a = 16
\(a=\frac{16}{2}\)
a = 8 cm.
∴ Equal sides measure 8 cm.

Try these (Text book Page No. 44)

Question 1.
Find the number of tiles required to fill the area of following figures

Solution:
i) Total number of tiles required = 16
Number of tiles already filled = 7
Remaining required tiles = 16 – 7 = 9
ii) Total number of tiles required = 12
Number of tiles already filled = 6
Remaining required tiles = 12 – 6 = 6
iii) Total number of tiles required = 12
Number of tiles already filled = 6
Remaining required tiles = 12 – 6 = 6
iv) Total number of tiles required = 16
Number of tiles already filled = 8
Remaining required tiles = 16 – 8 = 8

Activity (Text book Page No. 45)

Question 1.
Mark the base and height of the following right angled triangle.

Solution:
Activity to be done by the students themselves

Try These (Text book Page No. 45)

Question 1.
Draw the following in a graph sheet?
i) Two different rectangles whose areas are 16cm²
Solution:

Activity (Text book Page No. 46)

Question 1.
Find the area of the given ‘L’ shaped rectangular figure by dividing it into squares of equal sizes
Solution:
Activity to be done by the students themselves

Try this (Text book Page No.46)

Question 2.
Can you find the area of ‘L’ shaped figure as the difference between two areas.
Solution:
Here Area of L shape = (Area of the rectangle ABCD)
(Area of the rectangle GFHB) = (2 × 3) – (2 × 1) cm²
= 6 – 2 cm² = 4 cm²

Try these (Text book Page No. 46)

Question 1.
Measure using ruler and find the perimeter of each of the following diagram

Solution:
i) Perimeter = 2.5 + 0.5 + 1 + 1 + 0.5 + 1 + 0.5 + 1 + 0.5 + 1.5 = 10 cm
ii) Perimeter = 2.5 + 0.5 + 2.5 + 0.5 + 0.5 cm = 6.5 cm
iii) Perimeter = 0.5 + 1 + 0.5 + 0.5 + 1 + 1 + 0.5 + 1 + 1.5 + 0.5 + 1 + 0.5 cm = 9 cm
iv) Perimeter = 2 + 0.5 + 1.5 + 1.5 + 0.5 + 0.5 + 2 + 1 cm = 9.5 cm

Activity (Text book Page No 46)

Question 1.
Form all possible shapes of perimeter 80 cm with 9 identical squares, each of side 4 cm.
Solution:
Activity to be done by the students themselves

Activity

Question 2.
Cut a rectangular sheet along one of its diagonals. Two identical scalene right angled triangles are obtained. Join them along their sides of identical length in all possible ways. Six different shapes can be obtained. Four of them are given. Find the remaining two shapes. Find the perimeter of all the six shapes and fill in the table.



Based on the above activity answer the following questions:
i) Are the perimeters same for all the shapes?
ii) Which shape has the longest perimeter?
iii) Which shape has the shortest perimeter?
iv) Are the areas of all the shapes same? why?
Solution:
Activity to be done by the students themselves

Try These (Text book Page No. 49)

Question 1.
Find the approximate area of the following figures:

Solution:

Try these (Text book Page No. 50)

Question 2.
Fill in the blanks.
(i) 7 cm² = ____ mm²
Hint: 1 cm² = 100 m
Solution:
700

(ii) 10 m² = ___ cm²
Hint: 1 m² = 10000 cm²
Solution:
1,00,000

(iii) 3 km² = ____ m²
Hint: 1 km² = 1000000
Solution:
30,00,000

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 2 Measurements Intext Questions

Try These (Textbook Page No. 26)

Question 1.
Complete the following table:

Solution:

Question 2.
Determine which metric unit you would use to express the following:

1. The length of your middle finger.
2. The weight of an elephant.
3. The weight of the ring.
4. The weight of the tablet.
5. The length of the safety pin.
6. The height of the building.
7. The length of the seashore in Tamilnadu.
8. The volume of a cup of coffee.
9. The capacity of water in the tank.

Solution:

1. Cm
2. Kilogram
3. gram
4. milligram
5. millimetre
6. metre
7. Kilometre
8. Millilitre
9. Litre

Try These (Textbook Page No. 28)

Question 1.
Convert the following.
(i) 23 km into m
(ii) 1.78 m into cm
(iii) 7814 m into km
(iv) 8.67 mm into cm
(v) 16 l into ml
(vi) 1500 ml into l
(vii) 2360 l into kl
(viii) 873 l into ml
(ix) 40 mg into g
(x) 1550 g into kg
(xi) 6.5 kg into g
(xii) 723 g into mg
Solution:

Try These (Textbook Page No. 30)

Question 1.
Five kilograms of compost is needed for a coconut tree for every six months. How many kilograms of compost is needed for 50 such coconut trees for one and a half years?
Solution:
Compost needed for a tree for 6 months = 5 kg
Compost needed for 50 trees for half a year = 5 × 50 = 250 kg.
Compost needed for 1\(\frac { 1 }{ 2 }\) years = 250 × 3 = 750 kg. [∴ 1\(\frac { 1 }{ 2 }\) years = 3 half years]

Question 2.
Say True or False and Justify.
(a) Is it correct: 4 m + 3 cm = 7 m
(b) Can we add the following?
(i) 6 litre + 7 kg
(ii) 3 m + 5 l
(iii) 400 ml + 300 g
Solution:
(a) False.
4 m + 3 cm = 400 cm + 3 cm = 403 cm.
(b) (i) No, we can’t add.
(ii) No. We can’t add.
(iii) No. We can’t add.

Recap (Textbook Page No. 33)

Question 1.
Read and write the time in the appropriate place.

Solution:

Try These (Textbook Page No. 33)

Question 1.
Say the following time in two ways.
(a) 9.20
(b) 4.50
(c) 5.15
(d) 6.45
(e) 11.30
Solution:
(a) 9.20
20 minutes past 9
40 minutes to 10
(b) 4.50
50 minutes past 4
10 minutes to 5
(c) 5.15
15 minutes past 5
45 minutes to 6
(d) 6.45
45 minutes past 6
15 minutes to 7
(e) 11.30
30 minutes past 11
30 minutes to 12

Try These (Textbook Page No. 34)

Question 1.
Convert the following:
(i) 4 hours = _____ minutes
(ii) 240 minutes = ____ hours
(iii) 30 minutes = _____ seconds
(iv) 3600 seconds = _____ hours
(v) 2 hours = _____ seconds
Solution:
(i) 4 hours = 240 minutes
4 hours = 4 × 60 minutes = 240 minutes
(ii) 240 minutes = 4 hrs
240 minutes = \(\frac{240}{60}\) = 4 hrs
(iii) 30 minutes = 1800 seconds
30 minutes = 30 × 60 seconds = 1800 seconds
(iv) 3600 seconds = 1 hrs
3600 seconds = \(\frac{3600}{60}\) minutes = 60 minutes = \(\frac{60}{60}\) hours = 1 hour
(v) 2 hrs = 7200 seconds
2 hrs = 2 × 60 minutes = 120 minutes = 120 × 60 seconds = 7200 seconds

Try These (Textbook Page No. 36)

Question 1.
Convert the 12-hour format into the 24-hour format and vice versa.

Solution:
10 : 40 a.m. = 10 : 40 hours
11 a.m. = 11 : 00 hours
1 : 15 a.m. = 01 : 15 hours
5 a.m. = 05 : 00 hours
16 : 20 hours = 4 : 20 p.m.
00 : 40 hours = 12 :40 a.m.
1 p.m. = 13 : 00 hours
11 : 15 p.m. = 23 : 15 hours
3 p.m. = 15 :00 hours
12 midnight = 00 : 00 hours
12 : 25 hrs = 00 : 25 p.m.
4 : 10hrs = 4 : 10 a.m.

Try These (Textbook Page No. 39)

Question 1.
Check whether the following years as Ordinary or Leap Year?
1994; 1985; 2000; 2007; 2010; 2100
Solution:
We know that a leap year is divisible by 4.
In the case of a century which is divisible by 400 is a leap year.
1994 – Not a leap year (Not divisible by 4)
1985 – Not a leap year (Not divisible by 4)
2000 – It is a leap year (divisible by 400)
2007 – Not a leap year (Not divisible by 4)
2010 – Not a leap year (Not divisible by 4)
2100 – Not a leap year (Not divisible by 400)

Question 2.
How many days are there from 1st April to 30th June?
Solution:
Months from April to June are:

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 2 Integers Intext Questions

(Try These Text Book Page No. 26)

Question 1.
Read the following numbers orally.
(i) + 24
(ii) -13
(iii) -9
(iv) 8
Solution:
(i) + 24 is read as ‘ plus 24’ or ‘positive 24’
(ii) -13 is read as ‘minus 13’ or ‘negative 13’
(iii) -9 is read as ‘minus 9’ or ‘ negative 9’
(iv) 8 is read as ‘plus 8’ or ‘positive 8’ or simply ‘8’

Question 2.
Draw a number line and mark the following integers.
(i) 0
(ii) -6
(iii) 5
(iv) -8
Solution:

Question 3.
Are all natural numbers integers?
Solution:
Yes, all natural numbers are positive integers

Question 4.
Which part of the integers are not whole numbers?
Solution:
The numbers 0, 1, 2, 3, are whole numbers. Therefore negative part of the integers are not whole numbers.

Question 5.
How many units should you move to the left of 3 to reach -4.
Solution:

From 3, we should move 7 units to the left to reach -4.

(Activity Textbook Page No. 27)

Question 1.
Ask your parents / grandparents about the depth at which the various types of vegetables (seeds) should be planted, for their better and efficient growth. For the same, draw a number line indicating the depth of various vegetable seeds. (Draw the planting chart!).
Solution:
Activity to be done by the students themselves

(Try These Text Book Page No. 29)

Question 1.
Find the opposite of the following numbers :
(i) 55
(ii) -300
(iii) +5080
(iv) -2500
(v) 0
Solution:
For every positive integer, there is a corresponding negative integer as its opposite number and vice versa

Question 2.
Represent the following situations as integers.
i) A loss of ₹ 2000
ii) 2018 CE (AD)
iii) Fishes found at 60 m below the sea level
iv) 18°C below 0°C
v) Gaining 13 points
vi) A jet plane at a height of 2500 m
Solution:
(i) Since loss is negative, a loss of t 2000 is denoted as – ₹ 2000
(ii) Here CE (AD) can be considered as a positive number. Hence CE (AD) 2018 can be represented as + 2018.
(iii) Below sea level is represented as -60 m.
(iv) 18°C below 0°C is represented as – 18°C
(v) Gaining 13 points can be represented as + 13
(vi) Height of 2500 m is represented as + 2500 m.

Question 3.
Suppose in a building, there are 2 basement floors. If the ground floor is denoted as zero, how can we represent the basement floors?
Solution:
If the ground floor is denoted as 0, basement floors are represented as -1 and -2.

(Try This Textbook Page No. 31)

Question 1.
For two numbers, say 3 and 5, we know that 5 > 3. Will there be a change in the inequality if both the numbers have negative sign before them?
Solution:
We know that 5 > 3
But when we change the sign of both the numbers we get – 5 and – 3.
Here -5 is 2 units to the left of-3 and so – 5 < 3.
∴ The inequality changes when the signs of both the numbers are changed.

(Activity Textbook Page No. 31)

Question 1.
Take two cards from a deck of playing cards and identify, which is greater between them, assuming that the Joker card represents zero, black cards represent positive integers, red cards represent negative integers and the cards A, J, Q and K represent 1,11,12 and 13 respectively.
Solution:
Activity to be done by the students themselves

(Try These Textbook Page No. 31)

Question 1.
Is -15 < -26? Why?
Solution:
Given statement is wrong.
We will draw the number line and plot the numbers on it.

So -26 < -15

Question 2.
Which is smaller -3 or -5? Why?
Solution:
Comparing the numbers from the number line.

– 5 is 2 units to the left of -3 and so -5 is smaller than -3. i.e. – 5 < – 3

Question 3.
Which is greater 7 or -4? Why?
Solution:
7 is a positive integer and lies to the right of 0.-4 is a negative integer and lies to the left of 0
∴ 7 > -4

Question 4.
Which is the greatest negative integer?
Solution:

– 1 is the greatest negative integer.

Question 5.
Which is the smallest positive integer?
Solution:

+ 1 is the smallest positive integer.

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 4 Geometry Intext Questions

Try this (Text book Page No. 56)

Question 1.

The diagonal of a rectangle divides it into two equal halves but it is not a line of symmetry. why?
Solution:
We get two equal halves. But one half of the figure does not coincide exactly with
the other half with the line of symmetry. Therefore it is not a line of symmetry.

Try These (Text book Page No. 57)

Question 1.
Is the dotted line shown in each figure a line of symmetry? If yes put ✓otherwise put ✗ Justify your answer.

Question 2.
Check the following figures for symmetry ? Write YES or NO.

Try these (Text Book Page No. 59)

Question 1.
Draw the following figures in a paper. Cut out each of them and fold so that the two parts of each figure exactly coincide.

i) Which of the above figures have one, two or more lines of symmetry?
ii) Which of the above figures do not have any line of symmetry?
Solution:

2) All have lines of symmetry

Question 2.
Write the numbers from 0 to 9.
(i) Which numbers have a line of symmetry?
(ii) List out the numbers which do not have a line of symmetry.
Solution:
i) Numbers 1 and 3 have one line of symmetry.
ii) Numbers 2, 4, 5, 6, 7 and 9 do not have a line of symmetry7.

Activity (Text Book Page No. 59)

Question 1.
Complete the other half of the following figures such that the dotted line is the line of symmetry.

Activity to be done by the students themselves

Try this (Text Book Page No. 60)

Question 1.
Which other capital letters of English alphabets look like the same in the mirror?
Solution:
A, H, I, M, O, T, U, V, W, X and Z.

Activity (Text book Page No. 62)

Symmetrical figures by ink blots
Step 1 : Take a sheet of paper and fold it into half to make the crease.
Step 2 : Put some ink blots on one side of the crease of the paper.
Step 3 : Fold the paper along the crease and press it.
Step 4 : Open the paper, you will find an imprint of the ink blots on the other part also which is symmetrical about the crease.

Activity to be done by the students themselves

Try These (Text book Page No. 62)

Question 1.
Find the password :
“Kannukkiniyal has a new game app in her laptop protected with a password. She has decided to challenge her friends with this paragraph which contains that password”.
If you follow the steps given below, you will find it.
Steps :
i) Write the above paragraph in capita! letters.
ii) Turn the paper upside down and look at it in the mirror.
iii) The word which remains unchanged in the mirror is the password.
Solution:
i) KANNUKK IN IYAL HAS ANEW GAME APP IN HER LAPTOP PROTECTED WITH A PASSWORD SHE HAS DECIDED TO CHALLENGE HER FRIENDS WITH THIS PARAGRAPH WHICH CONTAINS THAT PASSWORD

iii) “DECIDED” is the password.

Question 2.
Form words using the Setters B, C, D, E,H, I, K, O and X. Write those words in paper in capital letters. Turn it upside down and look at them in the mirror.
Solution:
i) List the letters which have horizontal and vertical line of symmetry
ii) Do the words HIKE, DICE, COOK remain unchanged in the mirror?
iii) The words which you have found that remain unchanged in the mirror are ______, ______, ______
Solution:
B, C, D, E, H, I, K, O, X
i) Vertical lines of symmetry A, H, I, M, O, T, U, V, W, X, Y
Horizontal lines of symmetry B, C, D, E, H, I, K, O, X
ii) Yes
iii) HOOK, KICK, ICE

Try this (Text book Page No. 64)

Question 1.
Can you identify the object which does not have rotational symmetry in the above situations? Why?
Solution:
1) Computer mouse
2) Trapezium
3) Chair
4) School bags etc.

Question 2.
Suppose, the man hole cover of the water sump is in circular shape
i) The number of ways to dose that circular lid is ___
ii) What is its order of rotational symmetry?

Solution:
i) many
ii) Infinite

Activity (Text book Page No. 64)

Question 1.
Find the order of rotational symmetry by fixing the relevant shape in different ways.

Activity to be done by the students themselves

You can Download Samacheer Kalvi 6th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 2 Integers Additional Questions

Additional Questions and Problems

Question 1.
Write all the integers between – 5 and 10.
Solution:
On the number line, the number increases as we move to right and decreases as we move to the left
∴ -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

Question 2.
Write the opposite of each of the following
a) Profit of ₹ 500
b) Deposit of ₹ 2000
c) 50 km towards south
Solution:
The opposite of each are
a) loss of ₹ 500
b) withdrawal of ₹ 2000
c) 50 km towards North.

Question 3.
Write the succeeding number of the following

Solution:
We know that one more than the given number is its successor.

Question 4.
Write the preceding number of the following

Solution:
We know that one more than the given number is its successor

Question 5.
Write the following numbers with appropriate signs.
a) 100 m below sea level
b) 25°C above 0°C
c) Any 3 numbers less than 0
Solution:
a) -100 m
b) + 25°C
c) -1, -2, -3

Question 6.
Mark -4, -6, -2 and 3 on the number line
Solution:

Question 7.
Draw a number line and answer the following.
a) Which number will we reach, if we move 4 numbers to the right of-2?
b) Which number will we reach, if we move 5 numbers to the left of 1?
c) If we are at -8 on the number line, in which direction should we move to reach -13?
d) If we are at -6 on the number line in which direction should we move to reach -1 ?
Solution:

(a) 2
(b) -4
(c) left
(d) right

Question 8.
a) Write four negative integers greater than -15?
b) Write four negative integers less than -5?
Solution:
a) -11, -10, -5, -1,
b) -7, -15, -18, -20.

Question 9.
Compare the following using < or >

Solution:

Question 10.
Represent the following as integers
a) A deposit of rupees two thousand
b) An aeroplane is flying at a height of three thousand metres above the ground.
Solution:
a) + ₹ 2000
b) + 3000 m