Science Class 5 Pollution

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

If a town stops dumping trash into a nearby river but the fish are still dying, which of the following is the most likely "hidden" cause of the water pollution?

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A People are swimming in the river too much.
B Rainwater is washing chemical fertilizers from nearby farms into the river.
C The fish are getting too much sunlight.
D The river is flowing too fast for the fish to swim.

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Answer: B. Rainwater is washing chemical fertilizers from nearby farms into the river.

The answer is B) Rainwater is washing chemical fertilizers from nearby farms into the river, and the explanation is that this is "non-point source" pollution, where rain carries invisible chemicals from the land into the water.

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If a town stops dumping trash into a nearby river but the fish are still dying, which of the following is the most likely "hidden" cause of the water pollution?

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