Page 33 - ICSE Science 3 : E-book

EXERCISES

A. Fill in the blanks.

1. ____________ pumps blood to all parts of the body.

2. When we breathe in air, it moves down through the ____________ and
reaches the two ____________.

3. Deep breathing involves deep ____________ and holding the breath for

a few seconds before ____________.

4. ____________ are the substances that make our environment dirty.

5. We should use ____________ bags to reduce air pollution.

B. Tick () the correct answer.

1. Which of the following is not an internal organ of the body?

(a) Skin (b) Heart (c) Lungs

2. Which of the following organs fi lter and remove wastes from the blood?
(a) Brain (b) Stomach (c) Kidneys

3. What do we call the process of breathing in air?

(a) Contraction (b) Inhalation (c) Exhalation

4. What is the purpose of deep breathing?

(a) To relax our body

(b) To relax our mind

(c) To relax both our mind and body

5. Which is the correct way to reduce air pollution among the following
options?

(a) Burning wood, coal and garbage

(b) Growing more trees

(c) Bursting crackers

C. Write (T) for true and (F) for false statements.

1. Brain controls all the functions of our body.

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