The main properties ofair are:
■ Air is transparent. Airis a transparent medium which allows light to pass through it. The objects are seen clearly through air.
■ Air can be felt when it moves fast.
■ Moving air is called as wind.
■ Air is present everywhere.
■ Air can be displaced by water.
■ Air occupies space.
■ Air has weight.
■ Air expands on heating.
■ Air has no colour. It is not visible.
■ Air can be compressed and filled into a container.
■ Air exerts pressure.
