Air & Air Pressure

Gases that surround the Earth is called:

• Weather

• Atmosphere

• Air Pressure

• Climate

Air pressure________________ as altitude increases, due to the lower density of air molecules.

• stays the same

• increases

• never changes

• decreases

Why would you have more trouble breathing at the top of a mountain than you would at sea level?

• Oxygen is more dense at the mountaintop.

• Oxygen is less dense at the mountaintop.

• Carbon dioxide is more dense at the mountaintop.

• Carbon dioxide is less dense at the mountaintop.

What gas is the MOST abundant in the Earth’s atmosphere?

• oxygen

• carbon dioxide

• argon

• nitrogen

An instrument that measures changes in air pressure, consisting of a glass tube partially filled with liquid mercury:

• Aneroid Barometer

• Mercury Barometer

• Thermometer

• Anemometer

An instrument used to measure changes in air pressure is:

• Thermometer

• Barometer

• Anemometer

• Wind Vane

An instrument that measures changes in air pressure without using a liquid:

• Mercury Barometer

• Aneroid Barometer

• Thermometer

• Wind Vane

The pressure caused by the weight of a column of air pushing down on an area:

• Water Pressure

• Air Pressure

• Density

• Friction

The amount of force pushing on an area is:

• Pressure

• Friction

• Gravity

• Density

The amount of mass of a substance in a given volume is:

• Weather

• Climate

• Pressure

• Density