Category: Class 3

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 4 Science in Everyday Life

I. Say whether the following statements are true or False:

Question 1.
When we boil water, bacteria are destroyed.
Answer:
True

Question 2.
Idli is cooked by the process called steaming.
Answer:
True

Question 3.
Thermometer is used to measure pressure.
Answer:
False

Question 4.
Refrigerator helps to keep things cold.
Answer:
True

Question 5.
Garlic relieves hiccups and nausea.
Answer:
False

Question 6.
Boiling point of water is 100°C.
Answer:
True

II. Circle the name of the things from which idli is made:

Answer:

III. Match the home appliances and their functions:

Answer:

IV. Which of these are safe to do at home? Put (✓) or cross (✗) in the box.

Question 1.
Touching electrical appliances
Answer:
✗

Question 2.
Playing with sharp objects
Answer:
✗

Question 3.
Playing in kitchen
Answer:
✗

Question 4.
Keep safe distance from the gas stove and cylinder
Answer:
✓

V. Answer in a word or sentence:

Question 1.
How do you store fruits and vegetables for a longer period?
Answer:
We store fruits and vegetables for a longer time by preserving them in a refrigerator.

Question 2.
Name the instrument used to measure temperature.
Answer:
Thermometer is used to measure temperature.

Question 3.
How is idli prepared?
Answer:
Idli is a natural fermentation process. It is prepared by steaming of fermented better prepared from soaked rice and black gram dal.

Question 4.
What is the use of black pepper?
Answer:
Black pepper is a great remedy for cold and cough.

Question 5.
Which kitchen medicine is called the poor man’s antibiotic?
Answer:
Garlic is called the poor man’s antibiotic.

VI. Answer the following:

Question 1.
Write the uses of boiled water.
Answer:
Uses of boiled water:

• Destroys germs.
• Healthier digestion.
• Prevents us from the infection of water borne diseases.

Question 2.
Write the advantages of pressure cooker.
Answer:
Advantages of pressure cooker:

• It cooks food much faster,
• It saves energy.
• It retains more nutrients,
• Preserves the appearance of food.

Let us Think (Text Book Page No. 126):

Question 1.
The doctor advices patients to have idli or idiyappam. Can you guess why?
Answer:

• Idli or idiyappam is cooked by steaming.
• Steamed food is easily digested.

Tick (✓) the item which you see in your kitchen (Text Book Page No. 126):

Answer:

Tick (✓) the food item which are made by steaming (Text Book Page No. 126):

Answer:

Arrange the pictures in correct order (Text Book Page No. 127):

Answer:

Let us Discuss (Text Book Page No. 128):

Question 1.
Which one takes less time to cook pulses?
a. pressure cooker
b. mud pot
Answer:
a. Pressure cooker

Question 2.
List out the food items prepared by pressure cooker Discuss with your friends.
Answer:
Pulses, Rice, Idli, Briyani.

Match Column A and Column B (Text Book Page No. 129):

Answer:

a. (4)
b. (5)
c. (1)
d. (3)
e. (2)

Count and colour the objects (Text Book Page No. 130):

Answer:

What are your favourite food items? Do you know the ingredients of them? Do they have any medicinal If so, fill in the table. (Text Book Page No. 131):

Answer:

Real and Shadow (Text Book Page No. 132):

For what?
To learn how the shadows are formed.

How?

1. Make the classroom dark.
2. Light a candle.
3. Place a toy near the candle. What do you see?
4. Move the toy away from the candle. What do you see? Move the toy closer to the candle. What do you look at?
5. Experiment and see what happens to the shadow if the light source is dim?

Complete the sentence:

Question 1.
Moving the toy closer to the candle made its shadow ________.
Answer:
Short

Question 2.
While moving the object away made its shadow ______.
Answer:
Long

Question 3.
The big candle is bright and gives ________ shadow.
Answer:
dark, clear

Question 4.
The small is dim and gives ________ shadow.
Answer:
dim

Lava in a cup (Text Book Page No. 132):

What to do?

What happens when you (Text Book Page No. 133):

Answer:

First of all, the oil floats on the top of the water because it is lighter than the water. Since the salt is heavier than oil, it sinks down into the water and takes some oil with it, but when the salt dissolves, the oil goes up again. Is it not interesting?
Answer:
Yes, It is interesting.

3rd Standard Science Guide Science in Everyday Life Additional Questions and Answers

I. Choose the correct answer:

Question 1.
_________ is a common and usual breakfast of Tamil Nadu.
a) Idli
b) Poori
c) Pongal
Answer:
(a) Idli

Question 2.
_______ helps to reduce chest congestion.
a) Turmeric
b) Cloves
c) Coriander leaves
Answer:
(c) Coriander leaves

Question 3.
The best remedy for cold and caught is ________
a) cloves
b) ginger
c) black pepper
Answer:
(c) black pepper

Question 4.
Thermometer was invented in the year _________.
a) 1640
b) 1703
c) 1714
Answer:
(c) 1714

II. Fill in the blanks:

Question 1.
Idli is cooked by the method called
Answer:
steaming

Question 2.
_________ is a popular home appliance for preserving food.
Answer:
Fridge

Question 3.
_________ is invented by Thermometer.
Answer:
Daniel Fahrenheit

Question 4.
Boiling point of water is _______.
Answer:
100°C

III. Write True or False:

Question 1.
Science is the study of the natural world around us.
Answer:
True

Question 2.
Idiyappam is prepared from rice.
Answer:
True

Question 3.
Idli batter is fermented for 18 hours before use.
Answer:
False

Question 4.
Turmeric is a common anti-infectant.
Answer:
True

IV. Answer in a word or two:

Question 1.
How Science is involved in daily life?
Answer:

• Even in our sleep our body is working continuously.
• When we eat food, our digestive system is at work.

Question 2.
What is boiling?
Answer:
Heating a liquid until it becomes gas is called boiling.

Question 3.
Mention some safety measures in the kitchen.
Answer:

• Never play with kitchen utensils.
• Use a cloth to hold hot pans.
• Inform an adult in case you smell cooking gas leakage.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 3 Force

I. Fill in the blanks with suitable words:
(Push, force, pull, speed, gravitational force, direction, Muscular)

Question 1.
A __________ is needed to make a stationary object move.
Answer:
Force

Question 2.
The force applied with the help of muscle is called _________ force.
Answer:
muscular

Question 3.
__________ and __________ are known as forces.
Answer:
Push and pull

Question 4.
The reason for the fruits to fall from the tree is ________.
Answer:
gravitational force

Question 5.
Force changes the _________ and ________.
Answer:
speed and direction

II. Match the words with their pictures:

Answer:

III. Answer the following questions:

Question 1.
How do you open the door?
Answer:
I open the door by pushing or pulling.

Question 2.
Name the types of force.
Answer:
i) There are two types of forces.

1. Contact force
2. Non-contact force.

ii) Contact force is classified into three

1. Muscular force
2. Mechanical force
3. Frictional force

iii) Non-Contact force is classified into two.

1. Gravitational force
2. Magnetic force.

Question 3.
Which force is involved in collecting water from well?
Answer:
Muscular force is involved in collecting water from well.

Question 4.
What is push?
Answer:
When a force is applied in the direction of an object, it is called push.

Question 5.
What kind of force is used to make clay pot?
Answer:
Muscular force is used to make clay pot.

IV. Sujatha places a magnet near some objects. What are the objects that will be attracted from the list given below?
(note, pin, coin, rubber, shirt, comb, steel tumbler, nail)
Answer:
pin, coin, steel tumbler, nail.

V. Think and answer:
Raja throws a ball, a stone, a paper, and a leaf up in the air? What kind of force is involved here? What will happen to them?
Answer:
i) Gravitational force is involved here.
ii) So the ball, the stone, the paper, and the leaf will fall down. The earth pulls all the objects towards itself.

Intext Activity:

Let us look at the pictures below to understand movement and action better (Text Book Page No. 114):

In the above pictures.

Question 1.
What moves? _______, ________
Answer:
The ball, The cycle.

Question 2.
What is the action? _______, ________
Answer:
Hitting the ball, Riding the bicycle.

Put a tick (✓) mark for the pictures of motion (Text Book Page No. 116):

Answer:

Classify the following – Push or Pull (Text Book Page No. 116):

Answer:

S.No	Activities	Push / Pull
1	Riding the bicycle	Push
2	Moving the table towards you	Pull
3	Dragging the chair	Pull
4	Moving a car to start	Push
5	Opening the window	Push
6	Stretching the rubber band	Pull
7	Removing the shoe laces	Pull

Match the following (Text Book Page No. 118):

Answer:

Observe the picture and write the kind of force involved here (Text Book Page No. 120):

Question 1.

Answer:
Muscular force

Question 2.

Answer:
Mechanical force

Question 3.

Answer:
Gravitational force

Question 4.

Answer:
Magnetic force

Tick (✓) the muscular force (Text Book Page No. 120):

Answer:

Think (Text Book Page No. 121):

Question 1.
Why do we sprinkle the powder on the carrom board before playing carrom?
Answer:
We sprinkle the powder on the carrom board to make the surface of the board smooth. This reduces the friction between the surface of the carrom board, the striker, and the coins. As a result, the coins and the striker can move easily on the carrom board.

Classify (Text Book Page No. 121):

Answer:

List out the push activities	List out the pull activity	List the frictions here
Swing	Pulling wood	Sliding
Playing foot ball	Pulling trolley	Playing in sand
Kids scooter, cycling	Kiting	See saw

3rd Standard Science Guide Force Additional Questions and Answers

I. Choose the correct answer:

Question 1.
________ is the motion which gives the required result.
(a) Action
(b) Direction
(c) Shape
Answer:
(a) Action

Question 2.
________ involves an interaction between two or more objects.
(a) Matter
(b) Force
(c) Action
Answer:
(b) Force

Question 3.
When a force is applied without touching an object, it is called force.
(a) contact
(b) mechanical
(c) non-contact
Answer:
(c) non-contact

II. Fill in the blanks:

Question 1.
Change in position of an object is called _________.
Ahs :
movement

Question 2.
_________ is required in pulling than in pushing.
Answer:
Less force

Question 3.
The force applied by using the parts of our body is called _________ force.
Answer:
muscular

Question 4.
_________ is a force actions between two surfaces in contact.
Answer:
Friction

III. Write True or False:

Question 1.
Force can lift or drop an object.
Answer:
True

Question 2.
The force applied by a machine is called magnetic force.
Answer:
False

Question 3.
The force between two stones created a spark is called frictional force.
Answer:
True

Question 4.
Muscular force is a non-contact force.
Answer:
False

IV. Answer in a word or two:

Question 1.
Define Motion.
Answer:
When an object or a thing moves from one place to another, it is said to be in motion.

Question 2.
What is force?
Answer:
Force is a push or a pull on an object which makes it move, changes its shape, or stops it from moving.

Question 3.
What is pull?
Answer:
When a force is applied in the direction opposite to the direction of an object, it is called pull.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 2 States of Matter

I. Indicate whether the following statements are true or False:

Question 1.
Solids have a definite volume.
Answer:
True

Question 2.
Liquids can not flow.
Answer:
False

Question 3.
We can melt any substance by cooling it.
Answer:
False

Question 4.
Liquids can take the shape of a container.
Answer:
True

Question 5.
Gases have a definite shape or volume.
Answer:
False

Question 6.
Matter changes its state when heat is added or removed.
Answer:
True

Question 7.
A fuel is a substance which gives heat energy on burning.
Answer:
True

II. Fill in the blanks:
(Evaporation, Mass, Water, Solid, Stone, Freezing)

Question 1.
The measure of matter ¡n an object is _________.
Answer:
Mass

Question 2.
Change of liquid into vapour on heating is called _______.
Answer:
Evaporation

Question 3.
An example for liquid is _______
Answer:
Water

Question 4.
The change of liquid into solid on cooling is known as _______.
Answer:
Freezing

Question 5.
An example for solid is _______.
Answer:
Stone

III. Draw a line to match the objects and their state of matter:

Answer:

IV. Answer in a word or two:

Question 1.
Which of these is a solid: wood or juice? ______
Answer:
Wood.

Question 2.
Which of these is hard : a sponge or a glass or a cloth? ______
Answer:
a glass.

Question 3.
What are three states of matter? _______
Answer:
Solid, Liquid, Gas.

Question 4.
Name three substances which can change to liquid when they are heated?
Answer:
Ice, Cheese, Jaggery.

Question 5.
In which state of matter the particles are very close to each other?
Answer:
Solid State.

Question 6.
What state of matter is rain?
Answer:
Liquid State.

Question 7.
Which among the state of matter has definite size but no definite shape?
Answer:
Liquid State.

Question 8.
What would cause a liquid to turn into a solid?
a) Pouring it into a container
b) Heating it until it boils
c) Cooling it until it freezes
d) Keeping its temperature the same
Answer:
c) Cooling it until it freezes

Question 9.
What are some properties of pencil?
Answer:

• Pencil is rigid.
• It has definite shape and volume.
• It occupies a fixed space.
• They cannot move freely.

V. Find me: (Liquid, Water, Wood)

Question 1.
I am a five letter word. I am an essential need for your life. I remain in all the three states of matter. Who am I
Answer:
I am water.

Question 2.
I am a solid. I am obtained from the trees. I am useful for heating. Who am I?
Answer:
I am wood.

Question 3.
I am one among the three states. I have loosely arranged particles. I become vapour on heating. Who am I?
Answer:
I am liquid.

VI. Describe the word in one sentence:

Question 1.
Solid :
Answer:
Solids are things that have a definite shape and volume.

Question 2.
Liquid:
Answer:
Liquids are things that do not have a definite shape but occupies space.

Question 3.
Melting:
Answer:
Change of solid into liquid on heating is called melting.

Question 4.
Evaporation:
Answer:
Change of liquid into vapour on heating is called evaporation.

Question 5.
Freezing:
Answer:
Change of liquid into solid on cooling is known as freezing.

VII. Which change of state is taking place in each description below?

a. An ice cube turning to water _________
Answer:
Melting

b. Water turning to ice in a freezer _________
Answer:
Freezing

c. Change of liquid into vapour on heating _________
Answer:
Evaporation

d. A bathroom mirror misting up _________
Answer:
Condensation

Intext Activity:

Let us Do (Text Book Page No. 103):

Answer:

1. House
2. Chair
3. Board
4. Car

Let us Do (Text Book Page No. 105):

1. Place four 1L bottles of different shapes on the table.
2. Take a bucket with water.
3. Call one child to hold the empty bottles and the other to fill water into them using a paper cup.
4. Ask the other children to fill the table as given below.

Did each bottle need the same number of cups to get filled?
We can see that water takes up the same space in each bottle and the shape of the water is same as the shape of the bottle.
Answer:

Think Zone (Text Book Page No. 105):

Question 1.
What is the shape of water in your bottle?
Answer:
The water takes up the shape of my bottle.

Question 2.
What happens if you pour water on the floor or table?
Answer:
Spread from one place to another place.

Think Zone (Text Book Page No. 106):

Question 1.
Cooking gas in gas cylinder has a smell. Why?
Answer:
Because Ethyl mercaptan is added with LP& to find the leakage.

Let us Do (Text Book Page No. 107):

Say whether it is Solid or Liquid or Gas (Put ‘S’ for Solid, .’L‘ for Liquid and ‘G’ for Gas).

Answer:

Let us Read and Complete the table (Text Book Page No. 108):

Here are some properties of matter:

Copy the following table. Write each property in the correct column of the table. Some properties may belong to more than one column.

Answer:

Properties of solids	Properties of liquids	Properties of gases
Fixed Shape Rigid Fixed volume	No fixed shape Flow all sides Fixed volume	No fixed shape Flow all sides No fixed volume

Let us Do (Text Book Page No. 108):

Question 1.
Take some ice cubes in a container. Heat the container and observe the changes.
Answer:
Ice cubes melt.

Question 2.
Take some cheese in a container.. Heat the container and observe the changes.
Answer:
Cheese melts.

Question 3.
Take some jaggery in a pan. Heat the pan and observe the changes.
Answer:
Jaggery melts.

Let us think (Text Book Page No. 109):

Question 1.
What makes the coconut oil freeze in winter season?

Answer:
In winter season room temperature will drop down almost below 20°C which is less than the freezing point of coconut oil. So it freeze in winter season.

Complete the table (Text Book Page No. 109):

Answer:

Think and answer (Text Book Page No. 109):

a. Which can was taken from the fridge?
Answer:
Can A.

b. How do you know?
Answer:
Water droplets appear on the can A.

c. How did water droplets appear on the can A?
Answer:
Because of condensation.

d. Why are there no water droplets on can B?
Answer:
Can B is not kept in the fridge.

Let us Understand (Text Book Page No. 109):

Question 1.
Keep a stone on the floor. Does it move by itself?
Answer:
No.

Question 2.
Pour a mug of water on the floor. Does the water flow? Does it flow in one direction?
Answer:
Yes, the water flows in all direction.

Question 3.
Take an air filled balloon. Prick it with a needle. Does the air rush out?
Answer:
Yes.

Question 4.
Fill an open vessel with water. Press the surface of the water with your hands. How do you feel?
Answer:
Water overflows.

Look at the pictures. Write down what you see. (Text Book Page No. 110):
(Wood, Leaves, Paper)

Question 1.

Answer:
Paper burns

Question 2.

Answer:
Wood burns

Question 3.

Answer:
Leaves burns\

Match the following:

Answer:

3rd Standard Science Guide States of Matter Additional Questions and Answers

I. Choose the correct answer:

Question 1.
_______ becomes liquid and liquid becomes solid on colling.
(a) Matter
(b) Mass
(c) Gas
Answer:
(c) Gas

Question 2.
Change of liquid into solid on cooling is known as __________
(a) freezing
(b) condensation
(c) evaporation
Answer:
(a)freezing

Question 3.
Which one of the following is a solid fuel?
(a) Petroleum
(b) Wood
(c) Diesel
Answer:
(b) Wood

Question 4.
________ has a definite shape.
(a) Solid
(b) Liquid
(c) Gas
Answer:
(a) Solid

II. Write True or False:

Question 1.
Everything you can see and touch is made up of matter.
Answer:
True

Question 2.
The change of solid into liquid on heating is called evaporation.
Answer:
False

Question 3.
Electrical energy is also used as fuel for cooking and transporting.
Answer:
True

Question 4.
Substances when burnt give out heat.
Answer:
True

III. Fill in the blanks:

Question 1.
_______ take the shape of the container.
Answer:
Liquids

Question 2.
_______ is a mixture of gases.
Answer:
Air

Question 3.
The space occupied by an object is called ________.
Answer:
Volume

Question 4.
Everything around us is made up of _________.
Answer:
matter

IV. Answer in a word or two:

Question 1.
What is matter?
Answer:
Anything that occupies space and has mass is called matter.

Question 2.
What is mass?
Answer:
Mass is a measure of how much matter is in an object.

Question 3.
List out the examples of gases?
Answer:

1. Cloud
2. Smoke
3. Wind
4. Spray
5. Water vapour

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 1 My Body

I. Fill in the blanks.

Question 1.
We should wash our hands _______ playing out. (before/after)
Answer:
after

Question 2.
Intestinal worms cause ________(anaemia/cold)
Answer:
anaemia

Question 3.
Eating ________ is good for health, (fruits/ packed snacks)
Answer:
fruits

Question 4.
_______ improves our brain functions, (eating junk food/doing exercises)
Answer:
Doing exercises

Question 5.
If someone’s touch hurts you, then it is a _______(good touch/bad touch)
Answer:
bad touch

Question 6.
_________ is the word used to refer to the disabled persons, (handicapped/
differently-abled)
Answer:
Differently-abled

II. Say ’TRUE’ or’FALSE’.

Question 1.
Use soap to wash your hands.
Answer:
True

Question 2.
Open defecation causes cholera
Answer:
True

Question 3.
Bathing reduces blood circulation.
Answer:
False

Question 4.
Show pity on physically, challenged people.
Answer:
False

Question 5.
Always use ear buds to clean your ears.
Answer:
False

III. Answer the following questions in a few words.

Question 1.
What are the effects of open defecation?
Answer:
Effects of open defecation are :

• Waterborne diseases.
• Diseases caused by insect carrier.
• Pollution.

Question 2.
Write the benefits of bathing.
Answer:
Benefits of bathing are:

• Cleanses the body.
• Removes dirt and odour.
• Protects from infection.
• Improves blood circulation.

Question 3.
List out the types of touches.
Answer:
The two types of touches are good touch and bad touch.

Question 4.
Who are the persons in your safe circle?
Answer:
The persons in my safe circle are father, mother, grandpa, grandma, brother, sister and teacher.

Question 5.
Name the sensory organs of our body.
Answer:
The sensory organs of our body are eyes, nose, ears, tongue and skin.

IV. Arrange in correct order. (First and last steps are in correct sequence)

Question 1.
Wet your hands and apply enough soap.
Answer:
1

Question 2.
Rub the tips of your finger.
Answer:
6

Question 3.
Rub both hands by interlocking your fingers.
Answer:
4

Question 4.
Rub the back of each hand.
Answer:
3

Question 5.
Rub the palm together.
Answer:
2

Question 6.
Rub the back of each fingers.
Answer:
5

Question 7.
Rub the thumb and end of your wrist and rinse both hand with water.
Answer:
7

V. Answer the following questions.

Question 1.
When do we wash our hands?
Answer:
We should wash our hands

• Before and after eating.
• After using the toilet.
• After playing outside.
• After touching an animal.

Question 2.
What will you do when somebody who are not in your ‘safe circle* touches you?
Answer:

• I will shout “Don’t touch”.
• I will leave the place immediately.
• I will ask help from my parent or from my teacher.

Question 3.
How can we protect our skin?
Answer:

• Always use a mild soap.
• Keep your skin dry and clean.
• Dry your skin by rubbing gently with a clean cloth.
• Consult a doctor when you feel any itching, skin, injury or infection.

Question 4.
How do we get intestinal worms?
Answer:
We get intestinal worms by
i) Not washing hands after using toilets,
ii) Using open defecation.

Question 5.
How do you help differently-abled people?
Answer:
I will help the differently-abled people by

• Bring them to cross the road,
• Making way for them.
• Opening doors for the disabled,
• Treatthemasnormal people.

VI. Project work.

Question 1.
Collect proverbs related to self-hygiene, health and sanitation.
Answer:
Self-hygiene proverbs :

• A healthy man is a successf ul man
• A broken hand works, but not a broken heart.
• Hygiene is two thirds of health

Health proverbs:

• Work is half of health
• A healthy soul cannot live in a dry body
• Health is better than wealth.

Sanitation proverbs:

• Cleanliness is next to godliness
• Cleanliness is a state of purity, clarity, and precision
• Cleanliness and good sanitation in schools is a matter of high importance

InText Activity:

Tick(✓) the items used for personal hygiene (Text Book Page No. 86):

Question 1.

Answer:

Let us Write (Text Book Page No. 89):

Complete the Worksheet:

Germs

Question 1.
Do germs make people sick?

Answer:

Question 2.
Can you see germs?

Answer:

Question 3.
Where are the germs found?
Answer:

1. Germs are found in air and water.
2. Germs are found in our hands, nails and in the ridges.

Question 4.
What can I do to avoid the spreading of germs?
Answer:

1. We should wash our hands properly.
2. When we cough or sneeze, we should use handkerchief.

Think Zone (Text Book Page No. 89):

Question 1.
Preethi often bites her nails. Is it a good habit? Give reason.
Answer:
No, it is not a good habit.
Because germs are found under the nails, in the ridges.

Think and Discuss (Text Book Page No. 89):

Question 1.
Arun usually eats food or snacks without washing hands properly. Is it correct? Give reason.
Answer:
No, It is not correct. Because germs are found in dirty hands.

Put a tick (✓) for correct action and cross (✗) for the wrong action (Text Book Page No. 91):

Question 1.

Answer:

Let us Answer (Text Book Page No. 92):

Read the statements given below. Identify whether it is Right (✓) or Wrong (✗) and put the suitable symbol.

Answer:

Let us find (Text Book Page No. 92):

Question 1.

Answer:

Think Zone (Text Book Page No. 93):

Question 1.
Anu plays with her baby brother. As he cries, she gives him a pencil. On seeing this, Anu’s mom was shocked. She quickly takes the pencil back. Do you know why?
Answer:
The pencil has a sharp end. It may hurt the baby’s eye or ear.

Let us do (Text Book Page No. 95):

Read the given statements carefully. Write ‘T’ if it is True and ‘F’ if it is False.

Question 1.
Avoid playing video games or watching TV for a long time.
Answer:
T

Question 2.
Avoid loud noise.
Answer:
T

Question 3.
Do not clean your nose by inserting any object into it.
Answer:
T

Question 4.
A dirty tongue may cause disease and bad breath.
Answer:
T

Question 5.
Dry your skin by rubbing gently with a dirty cloth.
Answer:
F

Let us discuss (Text Book Page No. 98):

Question 1.
You are playing in the park. Someone gives you eatable things/toys. What will you, do?
Answer:
I won’t buy any things.

Question 2.
If someone touches you, you feel uncomfortable. What will you do immediately? To whom you will inform this?
Answer:

• I will leave that place immediately.
• I will inform to my parents or teachers.

Match (Text Book Page No. 99):

Question 1.

Answer:

Find and circle the words related to fitness (Text Book Page No. 101):
(SLEEP, ENERGY, HEALTHY, RUN, JUMP, PLAY, YOGA)

Answer:

3rd Standard Science Guide My Body Additional Questions and Answers

Choose the correct answer:

Question 1.
National De-worming day is observed on ________.
(a) April 7
(b) February 10
(c) October 15
Ans :
(b) February 1

Question 2.
Noise levels are measured in ________.
(a) decibels
(b) m/s²
(c) kg
Answer:
(a) decibels

Question 3.
_______ is a reading and writing method for visually challenged person.
(a) Abacus
(b) Braille
(c) Teaching
Answer:
(b) Braille

II. Match the following:

1. Global Hand Washing Day	a. February 10
2. National De-worming Day	b. April 7
3. World Health Day	c. November 19
4. World Toilet Day	d. October 15

Answer:

1. Global Hand Washing Day	a. October 15
2. National De-worming Day	b. February 10
3. World Health Day	c. April 7
4. World Toilet Day	d. November 19

III. Write True or False:

Question 1.
Do not clean your nose by inserting any object into it.
Answer:
True

Question 2.
Do not pick your nose.
Answer:
True

Question 3.
Rub your eyes with your fist.
Answer:
False

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 7 Information Processing

Quick ways of adding (Text Book Page No. 49):

Answer:

Exercise (Text Book Page No. 50):

Find the sum of

i) 5 + 1 + 5 + 9
Answer:

5 + 5 = 10
9 + 1 = 10
Hence the sum = 10 + 10 = 20

ii) 2 + 5 + 5 + 7 + 1
Answer:

2 + 7 + 1 = 10
5 + 5 = 10
Hence the sum = 10 + 10 = 20

iii) 3 + 6 + 1 + 2 + 8
Answer:

3 + 6 + 1 = 10
8 + 2 = 10
Hence the sum = 10 + 10 = 20

Add the given big numbers using the above method (Text Book Page No. 51):

Question 1.

Answer:
543 = 500 + 40 + 3
210 = 200 + 10

Question 2.

Answer:
298 = 200 + 90 + 8
501 = 500 + 1

Question 3.

Answer:
798 = 700 + 90 + 8
654 = 600 + 50 + 4

Question 4.

Answer:
348 = 300 + 40 + 8
681 = 600 + 80 + 1

Question 5.

Answer:
543 = 500 + 40 + 3
218 = 200 + 10 + 8

Question 6.

Answer:
716 = 700 + 10 + 6
540 = 500 + 40 + 0

Quick ways of subtracting (Text Book Page No. 52):

Answer:

Subtract the given numbers using the above method (Text Book Page No. 53):

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Question 5.

Answer:

Question 6.

Answer:

Question 7.

Answer:

Question 8.

Answer:

Question 9.

Answer:

Mental Arithmetic (Text Book Page No. 54):

Able to add and subtract single digit numbers and two digit numbers mentally:

Question 1.
In a tree planting ceremony, 6 coconut saplings and 5 neem saplings are planted. Find the total number of saplings planted.
Answer:
6 + 5 = 11

Question 2.
There are 5 tender coconuts in a tree. If they pick 3 tender coconuts, then find the remaining tender coconuts?
Answer:
5 – 3 = 2

Question 3.
46 boys and 27 girls visited a park on Sunday. Find the total number of boys and girls who visited the park?
Answer:
46 + 27 = 73

Question 4.
50 pens are in a box. Out of which, 34 pens are given to the students. Find the number of pens left?
Answer:
50 – 34 = 16

Question 5.
70 balls are given to 7 persons. How many balls are given to each person?
Answer:
70 ÷ 7 = 10 [10 × 7 = 70]

Question 6.
8 books can be arranged in a row. In how many rows can 48 books be arranged?
Answer:
48 ÷ 8 = 6 [8 × 6 = 48]

Question 7.
10 pens can be kept in a box. How many boxes are needed to keep 100 pens?
Answer:
100 ÷ 10 = 10

3rd Standard Maths Guide Information Processing Additional Questions and Answers

Question 1.
Find the sum of

(i) 7 + 7 + 3 + 3
Answer:

7 + 3 = 10 and
7 + 3 = 10
Hence the sum of the number = 10 + 10 = 20

(ii) 6 + 4 + 4 + 6
Answer:

6 + 4 = 10 and
4 + 6 = 10
Hence the sum of the number = 10 + 10 = 20

Question 2.
Add

Answer:

Question 3.
Add

Answer:

Question 4.
Subtract

Answer:

Question 5.
Subtract

Answer:

Samacheer Kalvi 3rd Standard Maths Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 6 Time

Times of a Day (Text Book Page No. 43):

Question 1.
Sort the events according to the time of happening
1. Sunrise
2. Sunset
3. Coming to school
4. Returning home from school
5. Breakfast
6. Dinner
7. Darkness outside
8. Say Good Morning
9. Say Good Evening

Answer:

Chronological order (Text Book Page No. 44):

Question 1.
Write ‘F’ for the event which comes first and ’N’ for the event which happens next.

Answer:

Question 2.
Arrange the following events in chronological order. (Text Book Page No. 45):

i. Started walking, birth, started schooling in class 1, studying in Class 3, studying in Class 2.
(i) Birth
(ii) Started walking .
(iii) Started schooling in class 1
(iv) Studying class 2
(v) Studying class 3

ii. Sowing seeds, plucking fruits, growing fruit, flowering in plant, watering plants.
Answer:
(i) Sowing seeds
(ii) Watering plants
(iii) flowering in plants
(iv Growing fruit
(v) Plucking fruits.

Time cyclic events in a year (Text Book Page No. 46):

Question 1.
List the events that form a cycle and that do not form a cycle.
i. Coming to school
ii. Rotation of a clock
iii. bays of a week
iv. Growth of your pet
v. Building your house
vi. Making of idly

Answer:

Question 2.
Complete the events of given cycle.

Answer:

3rd Standard Maths Guide Time Additional Questions and Answers

Question 1.
Arrange the following events in chronological order.
(i) Brushing teeth, going to school, waking up, having breakfast, taking bath
Answer:
Waking up, Brushing teeth, taking bath, breakfast, going to school.

(ii) Pongal, New year. Republic day, Christmas, Independence day.
Answer:
New year, Pongal, Republic day, Independence day, Christmas.

Question 2.
Write ‘F’ for the event which comes first and ‘N’ for the event which happens next.

Answer:

Question 3.
List the events that form a cycle and that do not form a cycle.
i. Months of a year
ii. Elections
iii. Growth of a plant
iv. Construction of a house
v. Olympics
Answer:

Question 4.
Arrange the following dates in chronological order.
17/11/2019, 18/08/2019
05/08/2018, 04/01/2017
Answer:

Question 5.
Arrange the following time in chronological order.
Morning 7.00 clock, Night 8:00 clock
Afternoon 2:00 clock, Evening : 5:00 clock
Answer:

Samacheer Kalvi 3rd Standard Maths Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 5 Money

Rupees and Paise (Text Book Page No. 36):

Question 1.
Convert the following rupees into paise.

Answer:

Add the following (Text Book Page No. 37):

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Question 5.

Answer:

Question 6.

Answer:

Subtract the following (Text Book Page No. 37):

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Question 5.

Answer:

Question 6.

Answer:

Exercise (Text Book Page No. 38):

Question 1.
Sengothai bought a school bag for ₹ 210.30 and a sports shoe for ₹ 260.20 find the amount to be returned by the shopkeeper if she has paid five hundred rupees to the shopkeeper.
Answer:
Adding rupees:

School bag = 210.30 (+)
Sports shoe = 260.20
Total cost = 470.50

Subtracting rupees:

Sengothai paid = 500.00
Total cost = (-) 470.50
Shopkeeper has to return = 29.50

Question 2.
Kumaran’s father asked him to get a change for ₹ 200 from his uncle. If his uncle gave him a hundred rupee note and a fifty rupees note. How much more his uncle has to give him?
Answer:
Adding rupees:

1 hundred rupees = 100.00
1 fifty rupees = (+) 50.00
Total = 150.00

Subtracting rupees:

Father gave = 200.00
Uncle returned = 150.00
More uncle need to give him = 50.00

Rate Charts and Simple Bills:

Question 1.
The following are the items eaten by Raju and his family. Fill in the blanks using the given bill.

i. Name of the Restaurant _________
Answer:
Hotel foods

ii. Bill number _________
Answer:
32

iii. bate of the bill ________
Answer:
30.10.2019

iv. Total number of items eaten _________
Answer:
3

v. Total amount of money to be paid _________
Answer:
310

Question 2.
Complete the given bill and find the total amount to be paid.

a.

Answer:

b.

Answer:

c.

Answer:

Question 3.
Prepare Bills for the items purchased using the given rate chart.

i. Ramya bought two pens three erasers and a sketch packets. Prepare a bill for her purchase.
Answer:

ii. Ravi bought an eraser a sharpener and two pens. Prepare a bill for his purchase.
Answer:

3rd Standard Maths Guide Money Additional Questions and Answers

Add:

Question 1.

Answer:

Question 2.

Answer:

Subtract:

Question 3.

Answer:

Question 4.

Answer:

Question 5.
Complete the given table and find the total amount to be paid.
Answer:

Samacheer Kalvi 3rd Standard Maths Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 4 Measurements

Recall (Text Book Page No. 26):

Some vessels full of water are given here. Observe them and tell which one can hold more water and which one holds less water.

Answer:
Mug hold less and bucket hold more water.

Measurement by non standard tools (Text Book Page No. 28):

Question 1.
Tick the container that holds more water.

Answer:

Question 2.
Which among the given container will hold more water?

Answer:

Measurement by standard tools (Text Book Page No. 32):

Question 1.
Complete the table classifying these under the given table.

Answer:

Less than 1 litre vessel	More than 1 litre vessel
1. Medicine bottle	1. Pot
2. Tumbler	2. Water can
3. Water pot	3. Oil can

Question 2.
Tick the appropriate unit to measure the given liquid.

Answer:

Question 3.
Tick the biggest unit.
i. a) 500 ml
b) 100 ml
c) 50 ml
d) 75 ml
Answer:
a) 500 ml

ii. a) 200 ml
b) 300 ml
c) 150 ml
d)175 ml
Answer:
b) 300 ml

iii. a) 5 l
b) 2 l
c) 8 l
d) 7 l
Answer:
c) 8 l

iv. a) 3 l
b) 300 ml
c) 30 ml
d) 30 l
Answer:
d) 30 l

v. a) 250 ml
b) 1500 ml
c) 760 ml
d) 75 l
Answer:
d) 75 l

Question 4.
Circle the smallest unit.

i. a) 250 ml
b) 350 ml
c) 50 ml
d) 750 ml
Answer:
c) 50 ml

ii. a) 300 ml
b) 350 ml
c) 800 ml
d) 275 ml
Answer:
d) 275 ml

iii. a) 10 l
b) 3 l
c) 9 l
d) 6 l
Answer:
b) 3 l

iv. a) 3 l
b) 350 ml
c) 5 ml
d) 40 l
Answer:
c) 5 ml

v. a) 2500 ml
b) 100 ml
c) 810 ml
d) 175 l
Answer:
100 ml

Question 5.
How many litres of water do you use for the following purpose in your house? Complete the table.

Answer:

3rd Standard Maths Guide Measurements Additional Questions and Answers

Question 1.
Tick the appropriate unit to measure the given liquid.

Answer:

Question 2.
Tick the biggest unit.

i. a) 250 ml
b)180 ml
c) 80 ml
d) 160 ml
Answer:
a) 250 ml

ii. a) 130 ml
b)170 ml
c) 300 ml
d) 450 ml
Answer:
d) 450 ml

iii. a) 7 l
b) 6 l
c) 3 l
d) 4 l
Answer:
a) 7 l

iv. a) 2 l
b) 325 ml
c) 6 ml
d) 45 l
Answer:
d) 45 l

v. a) 300 ml
b) 1750 ml
c) 1500 ml
d) 2 l
Answer:
d) 2 l

Question 3.
Circle the smallest unit.

i. a) 325 ml
b) 375 ml
c) 125 ml
d) 630 ml
Answer:
c) 125 ml

ii. a) 150 ml
b) 80 ml
c) 272 ml
d) 500 ml
Answer:
b) 80 ml

iii. a) 15 l
b) 12 l
c) 13 l
d) 2 l
Answer:
d) 2 l

iv. a) 7 l
b) 300 ml
c) 250 ml
d) 1 l
Answer:
c) 250 ml

v. a) 250 ml
b) 195 ml
c) 4 l
d) 15 ml
Answer:
d) 15 ml

Samacheer Kalvi 3rd Standard Maths Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 3 Patterns

Iterative patterns and processes:

Question 1.
Continue the pattern to complete the rangoli.

Answer:

Question 2.
Make a pattern of your own on the given category and draw a rangoli.

Answer:

Question 3.
Draw a pullikolams by looking at the reference image without lifting your hand.

Answer:

Question 4.
Draw 2 pullikolams of your choice along the given dots.

Answer:

Patterns obtained by adding numbers (Text Book Page No. 22):

Complete the addition table and observe the pattern in them.

Question 2.
Write the numbers which add upto the given addition fact.

Answer:

Question 3.
Find out the missing numbers and write them in the given blank.

Answer:

Exercise (Text Book Page No. 25):

Continue the patterns by using multiplication as repeated addition.

a.

Answer:

b.

Answer:

Exercise (Text Book Page No. 26):

Express the division facts as repeated subtraction using patterns.

a) 24 ÷ 3
Answer:

24 ÷ 3 = 8

b) 22 ÷ 2
Answer:

22 ÷ 2 = 11

c) 32 ÷ 4
Answer:

32 ÷ 4 = 8

d) 15 ÷ 3
Answer:

15 ÷ 3 = 5

3rd Standard Maths Guide Patterns Additional Questions and Answers

Question 1.
Find out the missing numbers and write them in the given blank.

Answer:

Question 2.
Continue the patterns by using multiplication as repeated addition.

Answer:

Question 3.
Express the division facts as repeated subtraction using patterns.

a) 24 ÷ 4
Answer:

24 ÷ 4 = 6

b) 21 ÷ 3
Answer:

21 ÷ 3 = 7

Samacheer Kalvi 3rd Standard Maths Guide

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 3 Chapter 2 Numbers

Equal sharing and repeated subtraction (Text Book Page No. 11):

Question 1.
Suppose Kabilan has to share the mangoes among 15 of his friends. How many mangoes would each of them get? How Many steps would he require to share the mangoes among them?

Complete the number line.

Answer:

Number of steps = 2

Complete the number line – 15

Repeated subtraction statement 30 -15 -15 = 0
Kabilan shared 30 mangoes among 15 of his friends in 2 steps.
Each friend got 2 mangoes.

Complete the table. (Text Book Page No. 12):

Answer:

Equal Sharing (Text Book Page No. 13):

Question 2.
Rangamma has 36 coconuts and arranges them into group of 4 each. Find the number of groups.

The number line can be drawn as

The number statement is ___________.
Answer:

The number line can be drawn as

The number statement is 36 ÷ 4 = 9.

Question 3.
Rangamma has got 48 gooseberries and arranges them into group of 6 each. Find the number of groups.

The number line can be drawn as

Answer:

The number can be drawn as

The number statement is 48 ÷ 6 = 8.

Question 4.
Find few other ways that Rangamma can group these 48 gooseberries and write the number statements.

a.
Answer:
48 ÷ 2 = 24

b.
Answer:
48 ÷ 3 = 16

c.
Answer:
48 ÷ 4 = 12

d.
Answer:
48 ÷ 6 = 8

e.
Answer:
48 ÷ 8 = 6

f.
Answer:
48 ÷ 12 = 4

g.
Answer:
48 ÷ 16 = 3

h.
Answer:
48 ÷ 24 = 2

i.
Answer:
48 ÷ 1 = 48

Exercise (Text Book Page No. 14):

a. Divide 8 Balls into a group of 2 Balls each.

Answer:

8 ÷ 2 = 4

b. Divide 15 oranges into a group of 3 each.

Answer:

15 ÷ 3 = 5

c. Divide 20 cups into groups of 5 each.

Answer:

20 ÷ 5 = 4

Multiplication and Division (Text Book Page No. 17):

Question 1.
Construct the division fact for the multiplication tables 3.

Answer:

Question 2.
Construct the division fact for the multiplication tables 4.

Answer:

Question 3.
Construct the division fact for the multiplication tables 5.

Answer:

Question 4.
Construct the division fact for the multiplication tables 10.

Answer:

Exercise (Text Book Page No. 19):

Divide and find the quotient.

Question 1.
20 ÷ 4 =
Answer:
4 × 1 = 4
4 × 2 = 8
4 × 3 = 12
4 × 4 = 16
4 × 5 = 20

20 ÷ 4 = 5

Question 2.
10 ÷ 2 =
Answer:
2 × 1 = 2
2 × 2 = 4
2 × 3 = 6
2 × 4 = 8
2 × 5 = 10

10 ÷ 2 = 5

Question 3.
24 ÷ 3 =
Answer:
3 × 1 = 3
3 × 2 = 6
3 × 3 =9
3 × 4 = 12
3 × 5 = 15
3 × 6 = 18
3 × 7 = 21
3 × 8 = 24

24 ÷ 3 = 8

Question 4.
10 ÷ 10 =
Answer:
10 × 1 =10

10 ÷ 10 = 1

Question 5.
30 ÷ 5 =
Answer:
5 × 1 = 5
5 × 2 = 10
5 × 3 = 15
5 × 4 = 20
5 × 5 = 25
5 × 6 = 30

30 ÷ 5 = 6

Question 6.
14 ÷ 2 =
Answer:
2 × 1 = 2
2 × 2 = 4
2 × 3 = 6
2 × 4 = 8
2 × 5 = 10
2 × 6 = 12
2 × 7 = 14

14 ÷ 2 = 7

3rd Standard Maths Guide Numbers Additional Questions and Answers

Question 1.
Divide 15 pencils into a group of 5 each.

Answer:

15 ÷ 5 = 3

Question 2.
Divide 16 balloons into groups of 4 each.

Answer:

16 ÷ 4 = 4

Question 3.
Divide and find the quotient.

(i) 32 ÷ 4 =
Answer:
4 × 1 = 4
4 × 2 = 8
4 × 3 = 12
4 × 4 = 16
4 × 5 = 20
4 × 6 = 24
4 × 7 = 28
4 × 8 = 32

32 ÷ 4 = 8

(ii) 21 ÷ 3 =
Answer:
3 × 1 = 3
3 × 2 = 6
3 × 3 = 9
3 × 4 = 12
3 × 5 = 15
3 × 6 = 18
3 × 7 =21

21 ÷ 3 = 7

Question 4.
Arjun has 10 apples. He divides them among 2 of his friends. How many apples would each friend get?

Answer:

Each would get 5 apples.

Samacheer Kalvi 3rd Standard Maths Guide