NC 8th Water Quality Standards Quiz

Which best explains why water quality standards have been created to ensure heavy metals in water are kept to a minimum?

• Heavy metals are linked to toxicities in humans and large amounts of heavy metals should not be consumed.

• Heavy metals can stain ceramic surfaces in homes and cost the homeowners hundreds in repairs.

• [Option C is not fully visible in the image.]

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The Environmental Protection Agency was assigned which task?

• setting standards and governing the cleanliness of water used by Americans

• setting standards and

Which aquatic environment would benefit the most from reduced runoff from lawns treated with fertilizers?

• lakes

• estuaries

• rivers and lakes

• estuaries and lakes

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Which accurately describes the relationship between nutrients and life-forms in an estuary?

• As nutrients increase, the number of life-forms increases.

• As nutrients decrease, the number of life-forms increases.

• As nutrients increase, the number of life-forms stays the same.

• As nutrients decrease, the number of life-forms stays the same.

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In the winter, the fur of the arctic fox is white. In summer, the fur darkens to a reddish brown. What most likely causes the fur of the fox to change color?

• the amount of sunlight present

• the fox’s habitat

• the fox’s genes

• the fox’s age

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Which will occur if humans continue to overload water systems with excess nutrients?

• chemosynthesis

• eutrophication

• nitrification

• photosynthesis

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Which is a bioindicator?

• an atlantian organism that indicates the health of the environment

• a living organism that indicates the health of the environment

• a chemical that indicates the health of the environment

• turbidity that indicates the health of the environment

Which process would most likely increase the dissolved oxygen level in a freshwater lake?

• algae bloom

• lake turnover

• photosynthesis

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Many waste lagoons from pig farms are found along the Neuse River. Which may happen if those lagoons are flooded and spill into the local water supply?

• Water upstream may be polluted.

• Water downstream may be polluted.

• Only water in the immediate area may be affected.

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Which would best allow a species to survive environmental changes?

• similar physical features

• low mutation rate

• small population

• genetic diversity

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