Chapter 10 Water Review

Plants use water to

• release as a waste product

• keep predators away

• make their own food

• attract pollinators

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

• 97 percent

• 71 percent

• 30 percent

• 3 percent

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The streams and small rivers that feed into a main river are called

• watersheds

• tributaries

• divides

• wetlands

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The water in ponds and lakes is

• moving

• deep

• still

• salty

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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

• filters

• habitats

• tributaries

• artesian wells

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

• salt water

• rainwater

• groundwater

• water vapor

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What causes cold, deep currents to form in the oceans near the poles?

• sinking of dense, cold water with high salinity

• the Coriolis force

• movement of a large mass of warm water across the Pacific

• sinking of cold freshwater from melting icebergs

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A large stream of moving water that flows through the oceans is called a(n)

• current.

• tsunami.

• tide.

• undertow.

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People can obtain groundwater by drilling a well

• above the water table.

• into an aquifer.

• into the unsaturated zone.

• into the impermeable layer.

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Wetlands provide habitats for many living things because of their sheltered waters and

• large supply of nutrients.

• thick layer of mud.

• lack of insects.

• ability to prevent floods.

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