AP Environmental Science : Freshwater

Study concepts, example questions & explanations for AP Environmental Science

varsity tutors app store varsity tutors android store

Example Questions

Example Question #31 : Introductory Concepts And Earth Science

What percent of the Earth's water is readily available for drinking and agriculture?

Possible Answers:

25%

1%

5%

3%

50%

Correct answer:

1%

Explanation:

97% of the Earth's water is saltwater and unusable for drinking or farming. of the 3% that is actually freshwater, 2% is frozen in glaciers, leaving humans with 1% of all water on earth to use for farming. 

Example Question #32 : Introductory Concepts And Earth Science

All of the following characteristics apply to the riparian zone except __________.

Possible Answers:

biofilters

high sun exposure

wildlife corridors

high species diversity

Correct answer:

high sun exposure

Explanation:

Shade provided by the riparian zone is crucial to stream temperature regulation.

The riparian zone is the edge of a river or stream, therefore it has high biodiversity due to edge effects. Biofilters in the riparian zone protect the aquatic environment it surrounds. Also, because the riparian zone spans distances of an aquatic environment's edge, it serves as a corridor for wildlife.

Example Question #33 : Introductory Concepts And Earth Science

The Great Lakes of North America represent the largest source of freshwater on the planet. Approximately how many years ago did the Great Lakes form?

Possible Answers:

10,000 years ago

100,000 years ago

10,000,000 years ago

100,000,000 years ago

Correct answer:

10,000 years ago

Explanation:

The correct response was 10,000 years ago. The Great Lakes formed during glacial recession of the most recent glaciation. This most recent glacial recession occurred between 10-15 thousands years ago. As the glaciers receded northward across North America, melting glacial waters drained and formed what is now known as the Great Lakes. 

Example Question #34 : Introductory Concepts And Earth Science

About 2% of the Earth's water supply is suitable for human and plant consumption. 98% of Earth's water is found in the oceans and is too salty for human or plant consumption. 

Where is a majority of Earth's fresh water found?

Possible Answers:

Ground water

Polar ice caps/glacial ice

Aquifers 

Rivers

Lakes

Correct answer:

Polar ice caps/glacial ice

Explanation:

Lakes, streams, rivers and ground water account for about a half a percent of the fresh water found on Earth. 

Example Question #35 : Introductory Concepts And Earth Science

Freshwater is a necessary resource for human survival. Approximately what percent of the Earth's water supply is found in freshwater resources that are groundwater deposits (i.e. rivers, lakes, and streams)?

Possible Answers:

2.0%

20%

0.2%

0.02%

Correct answer:

0.02%

Explanation:

The correct response is 0.02%. The rest of the water resources are either too salty, too deep, or too cold in frozen icecaps. 

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: