Hydrosphere & Water Properties

A water molecule is made up of

• 2 oxygen atoms bonded together

• two oxygen atoms bonded to a hydrogen atom

• two hydrogen atoms bonded to an oxygen atom

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Because water consists of polar molecules,

• water molecules tend to stick together.

• most of it is found at the North and South poles.

• it falls as sleet or snow when temperatures are cold.

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Tightness across the surface of water that is caused by polar molecules pulling on each other is called

• capillary action.

• surface tension.

• polar action.

Water is often called the universal solvent because

• its frozen form floats on its liquid form.

• it can cling to the fibers of paper and cloth.

• it dissolves so many substances.

Water is the only substance on earth that

• exists in the liquid state.

• commonly exists in all of its different states.

• freezes at very low temperatures.

The process by which a gas changes into a liquid is called

• melting.

• condensation.

• freezing.

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Plants use water to

• make their own food.

• attract pollinators.

• keep predators away.

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Approximately what percentage of Earth's water is fresh water?

• 71%

• 30%

• 3%

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As water moves slowly through a wetland, some waste materials settle out, some wastes are absorbed by plants, and silt and mud is trapped by plant roots. In this way, wetlands act as natural

• tributaries.

• filters.

• artesian wells.

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Water that fills the cracks and spaces in underground soil and rock layers is called

• rainwater.

• salt water.

• groundwater.

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