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5 Cards in this Set
- Front
- Back
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Hypoxia
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when aquatic plants die, the BOD rises as aerobic decomposers break down the plants, the DO(dissolved O2) drops and the water cannot support life; very low DO levels; dead zone in the Gulf of Mexico
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Anoxic
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no DO in the water
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Surface Mining
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cheaper and can remove more minerals; less hazardous to workers
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Ore
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a rock that contains a large enough concentration of a mineral making it profitable to mine
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Humus
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organic, dark material remaining after composition by micro-organisms
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