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.
FAQs on Air
1. What is air, and why is it important for us?
Air is the invisible mixture of gases all around us. It's essential because it provides us with the oxygen which we need to breathe and stay alive.
2. Can we use air for other things besides breathing?
Yes, air is used for lots of things. We can use air to fill up balloons, make things fly, and even make music with instruments like the flute and trumpet.
3. What Are the Main Gases in the Air?
The two main gases in the air are oxygen and nitrogen.
4. Can Air Be Heavy or Light?
Air has weight, but it's very light. Even though we can't see it, it still presses on everything around us.
5. What are few uses of air?
Here are few uses of air:
a. Breathing
b. Flying
c. Making Wind
d. Drying clothes
e. Making sound etc.
