Air and Atmosphere

Q.

Plants use ___ to make food through photosynthesis releasing ___ in the process.

1. Oxygen, nitrogen

2. nitrogen, carbon dioxide

3. oxygen, carbon dioxide

4. carbon dioxide, oxygen

Q. _______ gas is present in air in a very small quantity and is important for plants.

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

Q. ____ is the outermost layer of the Earth's atmosphere.

1. Troposphere
2. Thermosphere
3. Exosphere
4. Mesosphere

Q. Nitrogen gas is used in packaging of chips.

1. True
2. False

Q.

Plants use oxygen to make their food.

1. True

2. False

Q.

Hot air is less dense than cold air.

1. True

2. False

Q. The blanket of air that surrounds the earth is called the ___________.

1. atmosphere
2. temperature
3. crust
4. biosphere

Q. Give one word for the following. (1 mark)
The action of cutting down trees over a large area of a forest for human activities

Q.

Arun is standing near the sea at night , he feels the breeze blowing from

1. the land to the sea

2. the sea to the land

Q.

The pie chart shows the composition of air.
What do X and Y represent respectively?

1. Carbon dioxide, Nitrogen
2. Nitrogen, Oxygen
3. Nitrogen, Carbon monoxide
4. Helium, Argon