Compléter Air Pressure (Modified)Version en ligne This is meant to be a review of the air pressure within earth's atmosphere as well as a review of other characteristics. par Crystal Fullenkamp 1 gravity lower breathe matter bottom top pop decreases different downward less cooler temperature molecules top Air is made of and therefore air has a mass . The force of pulls the air molecules . Air pressure is like a human pyramid because both have more matter at the and less matter at the top . A human pyramid and air pressure also have more pressure at the bottom and less at the as the weight of the matter pushes down . Your ears may as you change altitudes because the air pressure inside your head and outside your head is and has to balance out . It is harder to at the of a mountain because there is air pressure and therefore less oxygen to breathe . Air pressure is greater with altitude because there are more air pushing downward due to the force of gravity , making the air more dense . Air pressure the higher into the atmosphere you go . Lastly , molecules hold and transfer heat . If there are less molecules at the top of a mountain , the at the top of the mountain will be much .