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Chapter 4, Unit A
Term | Definition |
---|---|
ecosystem | all the living and nonliving parts in an area |
ecology | the study of the relationships among living and nonliving parts of an area |
habitat | the place where a species lives |
niche | the role of a species in an ecosystem |
population | all of the members of one species that live in the same area |
community | all the populations living together in one area |
photosynthesis | the process by which plants use sunlight to make sugar from water and carbon dioxide |
producers | an organism that uses sunlight to make sugar from water and carbon dioxide |
consumers | an organism that consumes other organisms for food |
scavenger | an animal that feeds on the bodies of dead organisms |
decomposer | an organism that helps to break down and decay dead organisms and the wastes of living organisms |
energy pyramid | a diagram that compares the amount of energy available at each position, or level, in the feeding order |
food web | `a combination of all the food chains in a community |
respiration | the process by which organisms use oxygen and sugar to release energy |
nitrogen | a gas that makes up 80% of air |