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the study of interactions of living organisms with one another and with their physical environment |
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the place where a particular population of a species lives |
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differnet species live together in a habitat |
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a community and all the physical aspects of its habitat such as soil, water, and weather |
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the physical aspects of a habitat |
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the organisms in a habitat |
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variety of organisms, genetic differences and the communities and ecosystem where they occur |
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the first living things ina new habitat like small fast growing plants |
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regular progession of a species replacement |
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succesion that occurs where life has not existed |
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succession occurs in areas whrer there has been previous growth, such as abandoned fields or forest clearings |
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the rate at which organic material is produced by photosynthetic organisms in an ecosystem |
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organisms first captured energy |
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organisms that consume plants or other organisms to obtain energy necessary to build their molecules |
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a graphic organiser based on the organisms energy |
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the path of energy though the trophic levels of an ecosytem |
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second trophic level and are primary producers |
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third trophic level are secondary consumers |
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use simple surgars and starches stored in plants as food, but they cannot digest cellulose |
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organisms that obtain their energy from the organic wastes and dead bodies are produced at all trophic levels |
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interconnected group of food chains |
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a diagram in which each trophic levels id represented by a block stacked on top of each other |
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dry weight of tissue and other organic matterial found ina specific ecosystem |
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a pathway forms whem a substance enters living organisms such as trees from the atmosphere, water or soil; stays for a time in the living organism; then returns to the nonliving environment |
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water seeps into the soil beneath the surface of the earth |
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water moves in the the atmosphere by evaporating from leaves |
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the process of combining nitrogen with hydrogen to form ammonia |
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