Air

3 main gases in the air

Oxygen, carbon dioxide and nitrogen

Gas that is needed for living things to breathe

Oxygen

Gas that is breathed out by animals and humans

Carbon dioxide

Gas that is produced by plants

Oxygen

Gas that is used by plants to make food

Carbon dioxide

Definition of wind

Moving air

An object that produces electrical energy from the wind

Windmill

A vehicle that moves on the ocean with the help of the wind

Yacht

The importance of the wind

Move a sailing boat, rotate a windmill, fly a kite and dry clothes on the clothes line

Examples of phenomena caused by strong wind

Storms and big waves