WVGSA Grade 8 Science Practice Questions - West Virginia General Summative Assessment Grade 8 Science Exam

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Excessive agricultural runoff carrying synthetic fertilizer (nitrogen and phosphorus) enters a West Virginia river watershed. What environmental hazard does this nutrient pollution cause downstream?

Algal blooms that block sunlight and deplete dissolved oxygen when algae die and decompose (eutrophication) Immediate freezing of river water in summer Increased water clarity and oxygenation Depletion of all sediment from river beds

Correct Answer:

Algal blooms that block sunlight and deplete dissolved oxygen when algae die and decompose (eutrophication)

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