Front

Most of Earth's water is:

Back

Salty

Front

Where most freshwater is stored is in _________.

Back

Glaciers (ice)

Front

Water on the top of the earth can form lakes, rivers, or streams are called _____.

Back

Surface water

Front

As rock becomes more porous...

Back

The more water it can hold

Front

Why is fresh water a limited resource?

Back

Only 2.5% is drinkable and is stored in icecaps, rivers, and lakes.

Front

What is the main source of Earth's water?

Back

Oceans, which contain about 97% of Earth's water.

Front

What is groundwater?

Back

Water that is stored underground in soil and rock layers.

Front

What is surface water?

Back

Water that collects on the surface of the ground, such as lakes and rivers.

Front

What percentage of Earth's water is freshwater?

Back

About 2.5%.

Front

What is the water cycle?

Back

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