Air

Air is a mixture of gases. The air around us is made up of approximately 78% ______________.

• Oxygen

• Carbon dioxide

• Nitrogen

• Other gases

Air has no colour, taste or smell.

• True

• False

Which of the following is not correct

• Air has mass

• Air takes up space and volume

• Air is found almost everywhere

• Air cannot help things to move and fly

Hot is air is heavy and sinks. Cold air is light and floats.

• True

• False

The atmosphere is a thin layer of gases which blankets or surrounds the earth.

• True

• False

Air helps things to move and fly.

• True

• False

Air is important to us in several ways. It can help us in

• Burning

• Breathing

• Inflating

• All of the above

Air pollution can be caused by

• Smoke and dust

• Fumes from factories

• Quarries and construction sites

• All of the above