Unit 4: Lesson 4 HMH Science

Front

What is unsaturated air?

Back

Unsaturated air is air that contains less water vapor than it can hold at a given temperature.

Front

What happens to water in unsaturated air?

Back

In unsaturated air, more water evaporates into the air than condenses back into the water.

Front

What type of pressure system causes air to rise and create clouds?

Back

Low Pressure.

Front

What is weather?

Back

Weather is the condition of Earth's atmosphere at a certain time and place.

Front

Why do weather systems usually move from west to east across the United States?

Back

The jet stream moves from west to east.

Front

What occurs in a low-pressure system?

Back

In a low-pressure system, air rises and cools.

Front

What is the jet stream?

Back

The jet stream is a fast-flowing air current in the atmosphere that influences weather patterns.

Front

What is condensation?

Back

Condensation is the process by which water vapor in the air turns into liquid water.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor.

Front

What is humidity?

Back

Humidity is the amount of water vapor present in the air.