How do algal blooms affect the health of a water system?

They can block sunlight & their decomposition decreases dissolved oxygen in the water, decreasing the water quality.

They can block sunlight & their decomposition increases dissolved oxygen in the water.

Hog farming is a major source of revenue in NC and one of its biggest polluters. Why is this form of water pollution hard to control?

It is nonpoint source pollution

Which best represents point source pollutants?

oil spills and factory discharge

As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?

reducing water usage through conservation measures

discovering new reservoirs of water in the aquifer

A company wishes to build a golf resort above an aquifer. It is granted permission, but must follow regulations during the construction of the resort.

to minimize the impact of pollution on the environment

to reduce the amount of money spent on golf resorts

When too much freshwater is extracted from an underground source in a coastal region, saltwater can seep into the aquifer, making is unusable. Which action reduces the risk of saltwater seeps into the aquifer through good stewardship of resources?

conserving water by reducing consumption in homes, schools and businesses

building desalination plants to convert nearby saltwater to freshwater

When is conservation of the water supply most urgent?

when living in an area that has severe winters

an organism whose health in an ecosystem is studied to see how healthy an ecosystem is.

a poisonous substance that is produced by organisms and is capable of causing diseases

The US government agency whose job is is to protect human and environmental health is

EPA or Environmental Protection Agency

Hydrosphere Unit Test

Quiz

•

Science

•

6th - 8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-LS2-4, MS-LS2-1, MS-ESS3-4

+9

Standards-aligned

Amy Dunn

Used 70+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which ocean water temperature change is most dangerous for aquatic wildlife?

5 degree C to 10 C

15 degrees C to 20 C

25 degrees C to 30 C

35 degrees C or higher

Tags

NGSS.MS-LS2-1

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A recreational lake experiences eutrophication because of excess nutrients. Based on this information, how would the recreational lake most likely appear?

clear and blue

oily and greasy

murky and full of algae

orange and rust-colored

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which accurately describes the relationship between temperature and dissolved oxygen in a local lake?

An increase in temperature causes an increase in the dissolved oxygen level

An increase in temperature causes a decrease in dissolved oxygen.

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which is the greatest impact of large quantities of sediment flowing into NC rivers and streams?

sediment poisons fish

sediment increases the temperature of rivers and streams

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If a pond is located in an area with significant amounts of air pollution, which health measure would be most directly affected?

ph

dissolved oxygen

Tags

NGSS.MS-LS2-4

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Why does a cloudy river produce less plant life than a clear river?

A cloudy river has few dissolved nutrients, while a clear river has many.

A cloudy river prevents photosynthesis from occurring, while a clear river allows photosynthesis to occur in plants.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-4

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Ammonia is basic chemical found in animal wastes. Which of the following could be the ph of a river near a farm after a rainstorm?

9

2

Tags

NGSS.MS-PS1-2

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Hydrosphere Unit Test

20 questions

Which ocean water temperature change is most dangerous for aquatic wildlife?

A recreational lake experiences eutrophication because of excess nutrients. Based on this information, how would the recreational lake most likely appear?

Which accurately describes the relationship between temperature and dissolved oxygen in a local lake?

Which is the greatest impact of large quantities of sediment flowing into NC rivers and streams?

If a pond is located in an area with significant amounts of air pollution, which health measure would be most directly affected?

Why does a cloudy river produce less plant life than a clear river?

Ammonia is basic chemical found in animal wastes. Which of the following could be the ph of a river near a farm after a rainstorm?

Which aspect of water quality is most affected by changes in temperature?

Which factors can have the greatest effect on the health of a river system?

Rainbow trout are found in mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use of rainbow trout in water quality testing?

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