Worksheet on Air - Composition and Properties Class 1

1. Which of the following does not use air to create sound?

a)
b)
c)
d)

Answer: c) Piano produces sound by striking keys whereas flute, trumpet and voice rely on air movement to produce sound.

2. Which of the following activities does not cause air pollution?

a) 
b)
c)
d)

Answer: d) Planting a tree helps in controlling air pollution whereas all the other activities shown in the picture cause pollution.

3. Which of the following is not a property of air?

a) Air is weightless.
b) Air is odourless.
c) Air has mass.
d) Air exerts pressure.

Answer: a) Air may feel light compared to solid objects, but it has weight.

4. How does air help with the activity shown in the picture?

a) By making clothes wetter
b) By making clothes colder
c) By making clothes heavier
d) By blowing away the moisture

Answer: d) Air helps to dry clothes by blowing away moisture.

5. Which of the following gases is necessary for activities shown in the picture?

a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Argon

Answer: b) Oxygen is essential for fire to burn and it is also important to keep us alive.