Groundwater and Aquifers Concepts

How much of the Earth's water is fresh water?

• 97%

• 50%

• 3%

• 10%

What is an aquifer?

• A type of cloud that holds water

• A layer of rock that holds groundwater

• A large ocean current

• A machine that cleans water

1. Why are aquifers important? (select 3 correct answers)

• because aquifers can store water underground for future use.

• because aquifers provide clean water for people, plants, and animals.

• because aquifers can cause earthquakes.

• because aquifers support rivers, lakes, and ecosystems.

How do aquifers get filled with water?

• Water is pumped into them by machines

• Water flows directly from rivers into them

• Water filters down from the surface through rock and soil

• They are filled by underground volcanoes

What is one way human activities can pollute groundwater?

• Rain falling on the ground

• Water flowing in rivers

• Using too much fertilizer on farms

• Taking short showers