How do the molecules that constitute air create air pressure?

Air pressure is created by the molecules in air bumping into each other and everything around them. The air molecules are constantly in motion, constantly pushing and pulling against each other, and the surface of whatever is around them (including other molecules). As the molecules move, they exert force on the surface they are pushing or pulling against, creating an overall pressure that is called air pressure. The more molecules there are in a given area, the greater the pressure. Additionally, higher temperatures result in faster moving molecules which means an overall increase in air pressure.