AnswersEarth Systems BLab: Environmental Changes in a Watershed

Lab: Environmental Changes in a Watershed — Unit test Answers

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1
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What percentage of Earth’s water is fresh water?

A
3 percent
B
25 percent
C
75 percent
D
97 percent
2
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Which is one benefit that mangrove trees provide to surrounding coastal wetlands?

A
They hold soil in place.
B
They store floodwaters.
C
They maintain surface water flow.
D
They filter water and improve water quality.
3

Which statement explains one way that lakes form?

A
Lava flows block a river.
B
Streams flow into shallow areas.
C
Groundwater feeds into low-lying areas.
D
Grassy wetlands get covered by a stream.
4

Which feature separates watersheds?

A
basins
B
bays
C
ridges
D
rivers

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