* Air is a mixture of gases, primarily nitrogen and oxygen.

* Gas is a state of matter, like solid and liquid.

Therefore, air is made up of gases, but gas is not just about air. Many different substances can exist as a gas, such as:

* Helium in balloons

* Carbon dioxide in soda pop

* Methane in natural gas

So, while air is a mixture of gases, the word "gas" describes a state of matter, and air is only one example of something that exists in that state.