Air and Air Pressure

Front

What is air pressure?

Back

Air pressure is the result of the weight of a column of air pushing on an area.

Front

Is the density of air greater at high altitudes?

Back

False, the density of air decreases at high altitudes.

Front

What does it mean if more molecules are close together in a substance?

Back

It means the density is high.

Front

Where is air pressure greater: at the top of a mountain, at the bottom of a mountain, or at the center of a mountain?

Back

At the bottom of the mountain.

Front

Do high air pressure systems sink or rise in the atmosphere?

Back

High air pressure systems sink.

Front

What happens to air pressure as altitude increases?

Back

Air pressure decreases as altitude increases.

Front

What is the relationship between air density and temperature?

Back

As temperature increases, air density decreases.

Front

What is the primary gas that makes up the Earth's atmosphere?

Back

Nitrogen, which makes up about 78% of the atmosphere.

Front

What is the effect of humidity on air pressure?

Back

Higher humidity decreases air pressure because water vapor is less dense than dry air.

Front

What instrument is used to measure air pressure?

Back

A barometer.