Properties of air The properties of air are:
1. Air takes up space.
2. Air has mass.
3. Air is affected by heat.
4. Air exerts pressure.
5. Air can be compressed
6. Air is affected by altitude.
Air expands on heatingTake a bottle and cover the mouth of a bottle with inflated balloon as shown in the figure. Now heat the bottle,the air inside the bottle gets heated up due to which air molecules will start moving faster and takes space, becomes less dense and collide with the wall of the inflated balloon.This will create pressure and the balloon will expand. Hence air expands on heating and becomes less dense.
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