Unit Seven Atmosphere - Air Pressure Flashcards
What is the weight of air pushing down on an area?
Pressure
What is the amount of mass in a given volume of air?
Density
Why doesn’t air pressure crush a desk?
Air Molecules Pushes:
Up (underneath desk)
Down
Left
Right
As a result, the pressure balances out.
List the accurate phrases:
- Air has mass because it is made up of different atoms
- Because air has mass, it has density and pressure
- The more molecules in a given volume of air, the greater its density
- The greater the density of air, the less pressure exists
- Air has mass because it is made up of different atoms
- Because air has mass, it has density and pressure
- The more molecules in a given volume of air, the greater its density
True or False:
Falling Air Pressure - indicates that a storm is approaching
Rising Air Pressure - indicates a nice day
True
What are the units of a barometer?
Millibars (Aneroid Barometer)
Inches of Mercury (Mercury Barometer)
Term for Elevation above Sea Level
Altitude
True or False
Air pressure increases as altitude increase
False
True or False
As air pressure decreases, so does the air density
True
Why is air pressure greatest at sea level?
The lower you are in altitude, the more air molecules that you are pushing down on you.
The higher you are in altitude, the less air molecules that are pushing down on you.
True or False
As altitude increases so does air density
False
Choose the following phrases that explains why you would have more difficulty breathing at high altitudes than at sea level
- Air pressure is higher at higher altitudes
- Density of the air is greater at high altitudes
- The percentage of oxygen in the air is lower at high altitudes
- The amount of oxygen in each breath is less at high altitdues
- The percentage of oxygen in the air is lower at high altitudes
- The amount of oxygen in each breath is less at high altitdues
