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14 Cards in this Set
- Front
- Back
What is the principal source of energy input to biological systems?
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The Sun
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Define the term "food chain".
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A chart showing the flow of energy (food) from on organism to the next beginning with a producer.
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Define the term "food web".
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A network of interconnected food chains showing the energy flow through part of an ecosystem.
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Define the term "producer".
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An organism that makes its own organic nutrients, usually using energy from sunlight, through photosynthesis.
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Define the term "consumer".
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An organism that gets its energy by feeding on other organisms.
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Define the term "herbivore".
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An animal that gets its energy by eating plants.
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Define the term "carnivore".
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An animal that gets its energy by eating other animals.
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What is the energy loss between trophic levels?
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90% of the energy is lost.
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Define the term "decomposer".
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An organism that gets its energy from dead or waste organic matter.
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Define the term "ecosystem".
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A unit containing all of the organisms and their environment, interacting together, in a given area.
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Define the term "trophic level".
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The position of an organism in a food chain or food web.
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How many trophic levels to food chains have?
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Food chains usually have fewer than five trophic levels, because there is usually a producer, a herbivore, a small carnivore, and then a top carnivore.
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Define the term "carbon cycle".
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"A combined process, inclincluding photosynthesis, decomposition, and respiration, by which carbon as a component of various compounds cycles between its major reservoirs the atmosphere, oceans, and living organisms."
http://www.thefreedictionary.com/carbon+cycle |
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Describe the effects of the combustion of fossil fuels and the cutting down of forests on the oxygen and carbon dioxide concentrations in the atmosphere.
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The carbon dioxide level will increase, and the oxygen level will decrease. The trees will not use up the carbon dioxide anymore to produce more oxygen.
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