Air and Weather

The air on Earth is a mixture of gases.

• True

• False

The air on earth is only made up of oxygen and carbon dioxide.

• true

• false

What do people call the air that moves?

What does the air on earth exert?

• contraction

• evaporation

• pressure

• expansion

What happens to the air when it is heated?

• boils

• contracts

• expands

• none of the above

What happens to the air when it is cooled?

• shivers

• contracts

• evaporate

• expands

What is the importance of air?

• It maintains temperature

• It is the Earth's blanket

• Combustion

• None of the above

How does air help in sustaining life and growth?

• Respiration

• Perspiration

• Photosynthesis

• Circulation

How many percent of Nitrogen is there on earth?

• 0.03%

• 20.9%

• 78%

• 50%

What happens if the presence of nitrogen is lesser than oxygen?