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7gr Flow of Energy
TEKS 7.12A and 7.12B
| Term | Definition |
|---|---|
| producers | Autotrophs that are the foundation of food webs; trophic level 1 |
| primary consumers | organisms that eat producers for energy; herbivores |
| secondary consumers | eat primary consumers for energy; are carnivores or omnivores |
| tertiary consumers | obtain their energy by eating primary and secondary consumers; carnivores or omnivores |
| heterotrophs | they get their energy by consuming (eating) another organisms |
| trophic level | a level or a position in a food chain, a food web, or an energy pyramid |
| energy pyramid | a graphical representation that illustrates the flow of energy through different trophic levels in an ecosystem from the most energy (producers) to the least (tertiary consumers) |
| 10% rule | only 10% of energy is passed on from one trophic level to the next in an ecosystem |
| autotrophs | make their own food by transforming light energy from the sun, carbon dioxide, and water; photosynthesis |
| nutrients | a substance that provides nourishment essential for growth and the maintenance of life; minerals, water, oxygen, carbon dioxide, nitrogen, etc |
| biosphere | the part of the Earth that can support life; includes all living things and the places they are found |