Water on Earth

Front

To keep on living, all living things need _____.

Back

some form of water

Front

How much of the surface of the Earth is covered in water?

Back

more than two-thirds

Front

Most of the water on earth is _____

Back

in the oceans

Front

What kind of water is found in rivers, ponds, wetlands, and streams?

Back

fresh water

Front

What percent of the water on the planet is salty?

Back

about 97%

Front

What percent of the planet's total water supply is freshwater?

Back

about 3%

Front

Wells are dug to where _____ is stored.

Back

groundwater

Front

Rivers and lakes are examples of ______.

Back

surface water

Front

What happens once groundwater reaches a layer of rock in the ground that it cannot pass through?

Back

It creates an aquifer.

Front

What is the energy source for the water cycle?

Back

sun