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2018 Hydrosphere Unit Review ****

Science

8th Grade

Used 46+ times

2018 Hydrosphere Unit Review ****
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33 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which provide the best source of information about the quality of water in aquifers?

wells

lakes

septic tanks

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A scientist collected water quality data in a protected estuary over time. The scientist measures a nitrate level of 6 ppm, and a dissolved oxygen level of 2 mg/L. Which would the scientist most likely conclude about this site?

The nitrate and oxygen levels are normal.

The nitrate levels are high, and the oxygen levels are low.

The nitrate levels are high, and the oxygen levels are healthy.

The nitrate levels are low, and the oxygen levels are unhealthy.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which best describes an economic trade-off a community must make in order to maintain acceptable water quality?

enforcing environmental regulations to prevent point-source pollution

organizing informational meetings to prevent potential zoning restrictions

providing tax incentives for potential industrial development and expansion

developing community awareness programs to educate farmers about pesticides

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is the best way to conserve water?

Take a daily bath rather than a shower.

Wash several small loads of clothing rather than a few large ones.

Use the dishwasher only for small loads rather than for large loads.

Install low-flow toilets that reduce the amount of water being flushed.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Oceans cover about 70% of the surface of the Earth and form layers based on water depth. Which best describes a factor that is the same for the different layers of the oceans?

amount of oxygen

amount of light

amount of salt

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is most likely an example of point source pollution?

fertilizer sprayed onto a field

water runoff from a city street

a pipe flowing into a river

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which event will most likely cause increased turbidity in a lake or pond?

increase in runoff

decrease in runoff

increase in aquatic plants

decrease in aquatic plants

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