Unit Test — Cumulative exam Answers

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What percentage of Earth’s water is fresh water?

3 percent

25 percent

75 percent

97 percent

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Which could cause topsoil to be lost?

wind and water erosion

lack of use

compaction

desertification

Which is one function of a weather balloon?

enables forecasts seven to 10 days in advance

measures conditions in the upper atmosphere

locates and tracks storms and follows the path of storm systems

uses mathematical equations to show what will happen if conditions change

Which major type of air mass forms over warm water?

maritime polar

continental polar

maritime tropical

continental tropical

Where are jet streams found?

close to the poles

in the middle latitude

toward the equator

in the upper atmosphere

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