Where you will find the ozone layer?

• Troposphere

• Mesosphere

• Stratosphere

What is the function of the ozone layer?

• To allow uv rays from geeting to earth.

• To block uv rays from geeting to earth.

• Coldest layer

The hottest layer of the atmosphere

• Thermosphere

• Mesosphere

• Troposphere

This is the layer where meteors burn up.

• Exosphere

• Thermosphere

• Mesosphere

What is the percentage of oxygen in earth's atmosphere?

• 78

• 21

• 1

Which is the outermost layer of the earth's atmosphere?

• Exosphere

• Mesosphere

• Thermosphere

This is the layer where airplanes fly.

• Troposphere

• Stratosphere

• Exosphere

The gas use for burning is

• Nitrogen

• Oxygen

• Carbon di oxide

If you pick up two cans of air, one is full and one almost empty. The one that is full is heavier because....

• Air is a mixture of gas

• Air has weight

• Warm air expands

The amount of water vapour present in the air is called

• Solute

• Humidity

• Atmosphere