What Have You Learned About the Atmosphere?

The condition of Earth’s atmosphere at a particular place and time is called

• Weather

• Atmosphere

• Climate

• Forecast

The most abundant gas in the atmosphere is

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

This gas in the atmosphere makes up 21% of the air we breathe and is necessary for fire to burn.

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

What do dust, smoke, salt, and chemicals have in common?

• They are gases in the air.

• They make up water vapor in the air.

• They are particles in the air.

• They are none of the above.

Air contains water in the form of gas called

• Rain

• Water vapor

• Clouds

• Steam

The amount of mass in a given volume of air is

• Pressure

• Density

• Temperature

• Weight

The weight of a column of air pushing down on an area is called

• Density

• Air pressure

• Gravity

• Altitude

An instrument used to measure the air pressure is a(n)

• Thermometer

• Speedometer

• Barometer

• Anemometer

The distance above sea level is known as elevation or

• Altitude

• Temperature

• Millibars

• Degrees

How does air pressure change as altitude increases?

• Air pressure decreases with increasing altitude.

• Air pressure increases with increasing altitude.

• Air pressure decreases with decreasing altitude.

• Air pressure does not change with altitude.