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Topic 8: H I on Env
Topic 8: Human Impacts on the Environment
| Term | Definition |
|---|---|
| birth rate | the number of people born per 1,000 individuals for a certain period of time |
| death rate | the number of deaths per 1,000 individuals in a certain period of time |
| exponential growth | a rate of change that increases more and more rapidly over time |
| pollution | contamination of Earth's land, water, or air |
| overpopulation | a condition in which the number of humans grows beyond what the available resources can support |
| conservation | the practice of using less of a resource so that it can last longer |
| sustainable use | the practice of allowing renewable resources time to recover and replenish |
| point source | a specific source of pollution that can be identified |
| nonpoint source | a widely spread source of pollution that is difficult to link to a specific point of origin |
| emissions | pollutants that are released into the air |
| ozone | a form of oxygen that has three oxygen atoms in each molecule instead of the usual two; toxic to organisms where it forms near Earth's surface |
| acid rain | rain or another form of precipitation that is more acidic that normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air |
| deforestation | the removal of forests to use the land for other reasons |
| erosion | the process by which water, ice, wind, or gravity moves weathered particles of rock and soil |
| desertification | the advance of desert-like conditions into areas that previously were fertile; caused by overfarming, overgrazing, drought, and climate change |
| sustainable | using a resource in ways that maintain it in a certain quantity or amount for a certain period of time |
| sewage | the water and human wastes that are washed down sinks, toilets, and showers |
| sediment | small, solid pieces of material that come from rock or the remains of organisms; earth materials deposited by erosion |
| thermal pollution | a type of pollution caused by factories and power plants releasing superheated water into bodies of water |
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muellershauna
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