1-3 Air Pressure Flashcards
Why is the air at the top of a mountain hard to breathe
There are less oxygen molecules
Why does air have mass
The atoms and molecules in the air have mass
The force pushing on an area or surface is known as
Pressure
The amount of mass in a given volume of air is it’s
density
To coming unit used to measure air pressure
Inches and millibars
What is altitude
Altitude is the elevation above sea level
Which barometer has a glass tube open at the bottom end and partially filled with mercury
Mercury barometer
Why doesn’t air pressure crush us
Air molecules push it in all directions
What is an aneroid barometer
A barometer that is not filled with liquid and is portable
The result of the weight of a column of air pushing down on an area is called
Air pressure
There are more molecules in a given volume of air, the density is
Greater
What instruments are used to measure air pressure
Barometers
How does increasing the density of a gas affect its pressure
Increasing the density of a gas increases its pressure
Which barometer does not contain a liquid
Aneroid barometer
The weight the of air in the atmosphere causes
Air pressure
