We live on a planet which has an atmosphere. That is nothing more than the air around us. It is because of this air that we can breath and live on earth. It is this air that is absent on the moon and so the moon has no life. The atmosphere around us is made up of different elements.

There is oxygen, naturally as it allows us to breath and live, but there are also other gases such as nitrogen, and other material such as dust particles that make up the atmosphere. All these components of the atmosphere tend to put some pressure on us.

In fact when you stand you have air pressure acting on you on all sides. The body also exerts some pressure with the same force so you can stand and not get swayed by the air pressure. This is true of any substance that you see around you. Ever imagine what would happen if the air pressure was more than the pressure the substance you create?

How would the item react? Will it shoot out into outer space? Or will it react in some other way? You can conduct your own experiments and find out. Here is a link to a fun science project that you might enjoy doing.   These cans can be quite entertaining. They also give you the answer to the air pressure equation.