Water on Earth Review

During a portion of the water cycle, water falls to Earth’s surface as precipitation. Some of this water runs off into channels and keeps moving until it ends up in the ocean.

Which BEST describes the water in the channels?

• lake

• river

• aquifer

• wetland

Tags

NGSS.MS-ESS2-4

Which best describes the role of the water cycle?

• circulates existing water on Earth

• reduces pollution in most of the water

• increases usable supply of Earth’s water

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If water is recycled in the atmosphere, which best describes why water availability on Earth is decreasing?

• An increase in droughts is slowly reducing freshwater reservoirs.

• Due to an increase in Earth’s temperature, evaporation rates continue to increase reducing liquid water on the surface.

• Earth’s freshwater continues to become more polluted, reducing the supply of freshwater safe for humans to consume.

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NGSS.MS-ESS2-4

Where does most fresh water exist?

• ice caps, lakes, and streams

• glaciers, rivers, and oceans

• aquifers, ice caps, and glaciers

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Which percentage represents the amount of Earth’s water that is found in oceans?

• 3%

• 71%

• 97%

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Which best describes the characteristics of a river basin?

• the land drained by a river and its tributaries

• the land formed when rivers create estuaries and marshes

• the land at the mouth of a river where water flows into the ocean

• the land formed as a result of a river flooding

The water within an estuary can be best described as

• salty

• fresh

• a mix of salty and fresh water

Why is water from an aquifer more likely to be cleaner than water from other sources?

• because it forms where fresh and salt water meet

• because it receives water directly from precipitation

• because it rises to the surface near the ocean

• because pollutants are filtered by rock and soil deep within Earth

Tags

NGSS.MS-ESS2-4

An estuary can be best described as

• an area where fresh and salt water meet

• an area underground where water is stored

• an area frozen by cold temperatures

• an area where rivers flow

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Which of these is a freshwater reservoir?

• Gulf of Mexico

• Pacific Ocean

• Atlantic tidal basin

• Antarctic polar ice