Term
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Definition
only 10% of the usable energy is transferred because usable energy lost as heat
(2nd law), not all biomass is digested & absorbed, predators expend energy to catch prey |
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Term
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Definition
| (good: disinfection of water) ( bad: forms trihalomethanes) |
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Term
Primary succession;
Secondary succession: |
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Definition
development of communities in a lifeless area not previously inhabited by life (lava);
life progresses where soil remains (clear cut forest, fire) |
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Term
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Definition
| using waste heat to make electricity |
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Term
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Definition
| symbiotic relationship where both partners benefit |
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Term
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Definition
| symbiotic relationship where one partner benefits & the other is unaffected |
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Term
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Definition
| relationship in which one partner obtains nutrients at the expense of the host |
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Term
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Definition
| large distinct terrestrial region having similar climate, soil, plants & animals |
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Term
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Definition
| the number of individuals that can be sustained in an area |
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Term
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Definition
| reproduce early, many small unprotected offspring |
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Term
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Definition
| reproduce late, few, cared for offspring |
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Term
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Definition
when a change in some condition triggers a response that intensifies the changing
condition (EX: warmer Earth - snow melts - less sunlight is reflected & more is absorbed, therefore warmer
earth) |
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Term
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Definition
| organisms that possess favorable adaptations pass them onto the next generation |
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Term
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Definition
| said human population cannot continue to increase. Consequences will be war, famine & disease |
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Term
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Definition
| rule of 70 (70 divided by the percent growth rate) |
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Term
| Replacement level fertility |
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Definition
the number of children a couple must have to replace themselves (2.1
developed, 2.7 developing) |
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Term
World Population is;
US Population; |
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Definition
6 1/2 billion;
300 million |
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Term
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Definition
| birth & death rates high, population grows slowly, infant mortality high |
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Term
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Definition
| death rate lower, better health care, population grows fast |
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Term
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Definition
| decline in birth rate, population growth slows |
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Term
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Definition
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