Pre-Test: Earth's Water

Front

What is the main source of Earth's freshwater?

Back

Most of Earth's freshwater is stored in glaciers.

Front

What is a wetland?

Back

A wetland is an area of land that is saturated with water for part or all of the year.

Front

How do ocean currents help regulate Earth's temperature?

Back

Ocean currents help regulate Earth's temperature by releasing different amounts of thermal energy and moisture.

Front

What human activity has significantly increased CO2 levels in the atmosphere?

Back

Burning fossil fuels has increased the level of CO2 in the Earth's atmosphere the most.

Front

How do ocean waves move water?

Back

Ocean waves move water in a circular motion.

Front

What percentage of Earth's water is freshwater?

Back

Only about 2.5% of Earth's water is freshwater.

Front

What is the water cycle?

Back

The water cycle is the continuous movement of water on, above, and below the surface of the Earth.

Front

What is evaporation?

Back

Evaporation is the process by which water changes from a liquid to a gas.

Front

What is condensation?

Back

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

Front

What is a watershed?

Back

A watershed is an area of land that drains into a particular body of water.