Water on Earth QC Review

Front

What is the role of the sun in the water cycle?

Back

The sun provides energy that causes water to evaporate from surfaces, leading to condensation and precipitation, which are key processes in the water cycle.

Front

What percentage of Earth's water is freshwater?

Back

3% of Earth's water is freshwater.

Front

What percentage of Earth's water is saltwater?

Back

97% of Earth's water is saltwater.

Front

What is evaporation?

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?

Back

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

Front

What is precipitation?

Back

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

Front

What is the main source of Earth's water?

Back

The main source of Earth's water is the oceans, which contain 97% of all water on Earth.

Front

What is the significance of ice caps and glaciers in the water cycle?

Back

Ice caps and glaciers store a significant amount of Earth's freshwater, which can contribute to sea levels and freshwater availability when they melt.

Front

What is surface runoff?

Back

Surface runoff is the flow of water that occurs when excess water from rain, melting snow, or other sources flows over the ground and into bodies of water.

Front

How does water return to the Earth after evaporation?

Back

Water returns to the Earth as precipitation, which can fall as rain, snow, sleet, or hail.