Unit 3 Review

Which best explains why all of the Earth’s freshwater is not available for human use?

• Most of Earth’s freshwater is only in lakes.

• Most of Earth’s freshwater is underground.

• Most of Earth’s freshwater is still in the water cycle.

• Most of Earth’s freshwater is frozen water.

What effect does the water cycle have on the total amount of water on Earth?

• The total amount of water on Earth is constantly increasing.

• The total amount of water on Earth is constantly decreasing.

• The total amount of water on Earth remains relatively constant.

• The total amount of water on Earth changes due to periods of global warming and cooling.

Where is most of Earth’s freshwater located?

• in the clouds

• in the ice caps

• in the ocean

• in the ground

Why is water from an aquifer more likely to be cleaner than water from other sources?

• because it forms where fresh and salt water meet

• because it receives water directly from precipitation

• because it rises to the surface near the ocean

• because pollutants are filtered by rock and soil deep within Earth

Which best describes the characteristics of a river basin?

• the land drained by a river and its tributaries

• the land formed when rivers create estuaries and marshes

• the land at the mouth of a river where water flows into the ocean

• the land formed as a result of a river flooding

Which of the following describes the hydrosphere?

• All of the life on earth and where they live

• All of the rocks and where they are found

• a layer of earths atmosphere

• All of the water on earth

What is an aquifer?

• A type of water

• A small pond

• A pool of underground water created by infiltration

• Water stored underground in porous rocks via infiltration

What effect will increased precipitation have on a river basin

• Increased water levels

• No effect

• Decreased Water Levels

What effect will decreased precipitation have on a river basin

• Increased water levels

• No effect

• Decreased Water Levels

What effect will decreased evaporation have on a river basin

• Increased water levels

• No effect

• Decreased Water Levels