Air Pressure Properties of Air Air is made up of ________ and ______________, which have mass. Therefore, air has mass. Alongside mass, air has other properties, like __________ and ___________. Air’s density can be calculated by dividing its mass by its _________. More air in the same amount of ________ means the air is __________. atoms molecules density pressure volume space Denser The force pushing on an area or surface is known as _____________. The weight of the atmosphere pushes on everything. This force is felt as _________________. The air is quite heavy, but is pushing in all directions, so the weight of the air above you is balanced by the air pushing underneath you. Since ___________ air has more ________ than less dense air, it has a greater ____________. pressure Air pressure dense mass pressure

Air Pressure B. Altitude and the Properties of Air As mountain climbers ascend high peaks, they gain __________. This is also known as ____________, or the distance above ____________. The air pressure this high up is _______ than that at sea level. Air pressure _____________ as altitude _____________. altitude elevation Sea level less decreases increases As books are stacked on top of one another, each book gains more ___________ from those above it. Therefore, the books at the _________ have the most pressure and those at the top have the _______ pressure. The air’s density also goes down, meaning the molecules are more ______________ at higher altitudes. pressure bottom least Spread apart

Air Pressure D. Your Turn Although I already knew , by focusing on the lesson, I learned and . A question I would still like answered is .