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Env. Science
chap. 5
| Question | Answer |
|---|---|
| the movement of carbon from the nonliving environment into living things and back | carbon cycle |
| the process by which cells produce energy from carbohydrates; atmospheric oxygen combines with glucose to form water and carbon dioxide | cellular respiration |
| a final, stable community in equilibrium with the environment | climax community |
| an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources | consumer |
| an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi | decomposer |
| a gradual process of change and replacement in a community | ecological succession |
| the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms | food chain |
| a diagram that shows the feeding relationships between organisms in an ecosystem | food web |
| the process in which nitrogen circulates among the air, soil, water, plants, and animals in an ecosystem | nitrogen cycle |
| bacteria that convert atmospheric nitrogen into ammonia | nitrogen-fixing bacteria |
| the cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment | phosphorus cycle |
| the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce carbohydrates and oxygen | photosynthesis |
| a species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established | pioneer species |
| succession that begins in an area that previously did not support life | primary succession |
| an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem | producer |
| the process by which one community replaces another community that has been partially or totally destroyed | secondary succession |
| one of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers | trophic level |
Created by:
kathyadams
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