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100

This type of water contains dissolved salts and is found in oceans.

What is saltwater?

100

This describes water that has a mix of saltwater and freshwater, often found where rivers meet oceans.

What is brackish water?

100

This type of water has very low amounts of dissolved salts and is found in rivers and lakes.

What is freshwater?

100

This term refers to the amount of dissolved salt in water.

What is salinity?

100

This is the main location of Earth’s saltwater.

What is the ocean?

200

This is the largest source of freshwater on Earth.

What are ice caps/glaciers? (frozen)

200

This is freshwater stored beneath Earth’s surface.

What is groundwater?

200

This body of water is typically freshwater and flows across land.

What is a river?

200

This is the main reason humans cannot drink ocean water safely.

What is because it has saltwater?

200

This factor makes ocean water denser than freshwater.

What is dissolved salt?

300

This percentage represents how much of Earth’s water is saltwater.

What is 97%

300

This percentage represents how much of Earth’s water is freshwater.

What is 3%?

300

This is the largest reservoir of water on Earth.

What is the ocean?

300

This term describes any place where water is stored on Earth.

What is a reservoir?

300

This natural process wears away coastlines due to waves and currents.

What is erosion?

400

This reservoir holds freshwater underground in spaces between rock and soil.

What is an aquifer?

400

This is why saltwater cannot be used directly for most farming or drinking.

What is high salt content?

400

This is why freshwater is considered a limited resource despite covering much of Earth.

What is because it is frozen or in groundwater?

400

This is the term for large underground layers of rock that hold water.

What is an aquifer?

400

The percentage of freshwater that is frozen?

What is 68%?

500

This type of water is found in estuaries where rivers meet the ocean.

What is brackish water?

500

This body of water can be freshwater and is surrounded by land.

What is a lake?

500

This human action can increase coastal erosion by removing natural barriers.

What is removing vegetation (or building on coastlines)?

500

The percentage of water that is trapped underground (groundwater).

What is 30%?

500

The unit of measure for salt in water. 

What is parts per thousand? (ppt)