Chapter 11: Pressure and Density of the Atmosphere
Your ears pop when you ascend in an airplane because
A & B
Air density varies with _____.
All of the above
The force of the air weighing down over a unit of area is known as _____.
Atmospheric pressure
Why do ears pop at higher altitudes?
Because the atmospheric pressure is lower and the air is less dense at higher altitudes.
The number of molecules in a given volume is called _____.
Density
_______, or the mass per unit volume, is a measure of how closely molecules are packed together.
Density
When you are in an airplane, you mostly feel the increase and decrease of altitude in this part of your body?
Ear
Low-pressure areas have more atmospheric mass above their location.
FALSE
The atmosphere has the same properties at different elevations, or altitudes, above sea level.
FALSE
The atmospheric pressure increases with height as we move upwards through the atmospheric layers.
FALSE
With increasing altitude, air density also increases.
FALSE
People who climb tall mountains set up camp at higher and higher elevations to get used to the
Less dense atmosphere
Air density decreases with increasing altitude because gravity has less pull on the molecules.
TRUE
Air is denser at sea level, where the gravitational pull is greater.
TRUE
Air pressure decreases as the altitude increases.
TRUE
Ears pop as air pressure inside and outside the ear equalizes.
TRUE
Gases at sea level are compressed by the weight of the atmosphere above them.
TRUE
Gravity pulls more air molecules toward the center of the planet.
TRUE
Temperature decreases with increasing altitude in the troposphere because the molecules are not packed as tightly together at higher altitudes.
TRUE
The density of air decreases with increasing altitude.
TRUE
We are not crushed by air pressure because the molecules inside our bodies are pushing outward as much as the atmosphere is pushing in.
TRUE
Why is the air denser the closer you are to sea level?
The gravitational pull is stronger closer to the center of the Earth
What could happen to a capped bottle full of air if it was taken from sea level up to the top of Mt. Everest?
The higher pressure on the inside than on the outside would make it push its cap off
Elevation or height above sea level is called __________.
altitude
The force of air weighing down over a given area is known as air _________________.
pressure