Lesson 4.2: Earth's Waters

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Last updated 3:38 PM on 8/31/26
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10 Terms

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Earth’s water budget

The total amount of water in the planet

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Ocean

What is the largest reservoir of water?

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97.5%

The ocean contains how many percent of Earth’s total water?

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2.5%

Freshwater contains how many percent of Earth’s total water?

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68.7%

How many percent of Earth’s water is found in glaciers?

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30.1%

How many percent of Earth’s water is found in groundwater?

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0.8%

How many percent of Earth’s water is found in permafrost?

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Residence time

It is the average length of time spent by water molecule in a reservoir.

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salinity

The saltiness of saltwater

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Weathering

The in situ disintegration of geologic materials, releases soluble materials such as sodium, potassium, and sulfur.