Page 2 - PPT 2

1. Air is a tasteless, odorless and invisible

mixture of gases.

2. There are layers of air that cover the earth so

air is all around us.

3. It is a mixture of many gases

( nitrogen, oxygen and carbon-dioxide) , dust

particles and water vapour.

1. It is the clear gas in which living things live

and breathe.

Features:-

1. We cannot see, smell or taste air.

2. We can just feel the presence of air.