Distribution of Earth's Water

Where is most of Earth's water located?

• polar ice caps

• groundwater

• oceans

• atmosphere

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Why is most of Earth's water not available to drink?

• It is contaminated.

• It is in the polar ice caps.

• It is underground.

• It has a high level of salinity.

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Where is most of Earth's freshwater located?

• underground

• polar ice caps

• rivers and lakes

• oceans

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Where do humans get most of the water they use?

• rivers and lakes

• polar ice caps

• water vapor

• groundwater

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In order for water vapor to form, what must occur?

• Precipitation

• Condensation

• Evaporation

• Transpiration

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Water underground is stored in ____________.

• aquifers

• reservoirs

• wells

• depositories

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Above ground areas that have fresh water available for humans to use are called _________________.

• aquifers

• tributaries

• irrigation systems

• reservoirs

Water moves through Earth's layers until it reaches a ______ layer.

• saturated

• water table

• impermeable layer

• permeable

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Approximately _____ percent of Earth's water is freshwater.

• 97

• 1

• 3

• 10

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Approximately what percent of Earth's water is salt water?

• 3

• 70

• 79

• 97

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