Water on Earth

Front

What is the main source of Earth's water?

Back

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

Front

What percentage of Earth's water is freshwater?

Back

Only 3% of Earth's water is freshwater.

Front

What is groundwater?

Back

Groundwater is water that fills the spaces between rocks and soil beneath the Earth's surface.

Front

What are rivers classified as?

Back

Rivers are classified as freshwater.

Front

What is the greatest threat to groundwater due to population growth?

Back

Sewage is likely to be the greatest threat to our groundwater as the population grows.

Front

Where is most of the Earth's freshwater found?

Back

Most of the Earth's freshwater is found in glaciers and ice caps.

Front

What is the process of water moving from the ground to the atmosphere called?

Back

The process is called evaporation.

Front

What is the term for water that falls from the sky?

Back

Precipitation.

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 salinity?

Back

Salinity is the concentration of salt in water.