1. 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

2. 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

3. 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