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6 Cards in this Set
- Front
- Back
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Drought
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A long period of unusually low rainfall.
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Nonpoint-source pollution
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Pollution whose source is hard to find or is scattered.
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Lock
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A section of waterway, closed off by gates, in which the water level is raised or lowered for ships to get through.
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Aquaculture
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The science and business of raising and harvesting fish in a controlled situation.
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Concentration
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The amount of a substance in another substance.
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Dam
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A structure that holds back and controls the flow of water in a river.
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