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

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