Class 2 What does Air have

Class 2 What does Air have

Choose the Correct option

What is the primary gas present in the air that is essential for breathing?

1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Hydrogen

 

What happens when wet clothes are hung out to dry in the sun?

1. They become colder
2. They freeze
3. Water in the clothes turns into water vapor
4. They become wetter

 

What are the tiny particles that can be seen dancing in sunlight coming through a window?

1. Oxygen molecules
2. Water droplets
3. Dust particles
4. Carbon dioxide molecules

 

What is a potential harm caused by the presence of smoke in the air?

1. Enhanced air quality
2. Health problems
3. Improved breathing
4. Increased oxygen levels

 

What are the very small harmful living things present in the air?

1. Insects
2. Birds
3. Germs
4. Plants

 

Which gas is necessary for burning and is present in the air?

1. Carbon dioxide
2. Nitrogen
3. Oxygen
4. Hydrogen

 

How does water vapor get into the air?

1. Through the process of evaporation
2. Through the process of condensation
3. Through the process of freezing
4. Through the process of sublimation

 

What do animals and plants use oxygen for?

1. To produce water vapor
2. To produce carbon dioxide
3. To breathe and stay alive
4. To create sunlight

Answers:

b) Oxygen

c) Water in the clothes turns into water vapor

c) Dust particles

b) Health problems

c) Germs

c) Oxygen

a) Through the process of evaporation

c) To breathe and stay alive

Short question and answer

Q: What is the main gas present in the air that is important for breathing?

A: Oxygen.

 

Q: What happens to water in wet clothes when they’re hung out in the sun?

A: It turns into water vapor and becomes part of the air.

 

Q: Why do we sometimes see dust particles in sunlight passing through a window?