Water on Earth QC Review

Front

What is the water cycle?

Back

The water cycle is the continuous process by which water moves from the Earth's surface to the atmosphere and back, involving processes like evaporation, condensation, and precipitation.

Front

What role does the sun play in the water cycle?

Back

The sun provides the heat necessary for evaporation, which is the first step in the water cycle.

Front

What happens to the water cycle without heat from the sun?

Back

The water cycle would not work.

Front

What percentage of Earth's water is saltwater?

Back

97% of Earth's water is saltwater.

Front

What percentage of Earth's water is freshwater?

Back

3% of Earth's water is freshwater.

Front

How much of the Earth's freshwater is accessible for human consumption?

Back

Only 1% of the Earth's freshwater is accessible for human consumption.

Front

What is evaporation in the water cycle?

Back

Evaporation is the process by which water changes from a liquid to a gas, usually due to heat from the sun.

Front

What is condensation in the water cycle?

Back

Condensation is the process by which water vapor cools and changes back into liquid water, forming clouds.

Front

What is precipitation in the water cycle?

Back

Precipitation is any form of water, such as rain, snow, sleet, or hail, that falls from the atmosphere to the Earth's surface.

Front

What is the main source of freshwater on Earth?

Back

The main sources of freshwater on Earth are glaciers, ice caps, and groundwater.