Properties of Air

Front

What is the definition of air?

Back

Air is a mixture of gases that surrounds the Earth, primarily composed of nitrogen (78%), oxygen (21%), and small amounts of other gases.

Front

What does it mean that air takes up space?

Back

It means that air has volume and can occupy physical space, which can be demonstrated through various experiments.

Tags

NGSS.5-PS1-3

Front

What is the troposphere?

Back

The troposphere is the lowest layer of Earth's atmosphere, where weather occurs and where we live.

Front

What is the stratosphere?

Back

The stratosphere is the second layer of the atmosphere, located above the troposphere, where commercial airplanes typically cruise.

Front

What is the exosphere?

Back

The exosphere is the outermost layer of the atmosphere, where satellites orbit the Earth.

Front

What happens to air pressure when you blow into a balloon?

Back

The air pressure inside the balloon increases, causing it to expand.

Tags

NGSS.MS-PS1-4

Front

What is atmospheric pressure?

Back

Atmospheric pressure is the force exerted by the weight of air above a given point, typically measured in millibars or inches of mercury.

Front

How does air pressure change with altitude?

Back

Air pressure decreases as altitude increases because there is less air above to exert pressure.

Front

What is the principle of air pressure?

Back

Air pressure is the result of the weight of air molecules pushing down on the Earth's surface.

Front

What is the relationship between air temperature and air pressure?

Back

Generally, as air temperature increases, air pressure decreases because warm air is less dense than cold air.