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7gr Flow of Energy
| Term | Definition |
|---|---|
| radiant energy | energy from the sun that is transformed into chemical energy in plants |
| producers/autotrophs | organisms that produce food for themselves; transform radiant energy from the sun to chemical energy they can use or store |
| primary consumers | organisms that eat producers for their energy |
| secondary consumers | consume primary consumers and possibly secondary consumers too |
| tertiary consumers | obtain their energy by eating primary and secondary consumers |
| heterotrophs | they get their energy from another organism |
| food webs | model that interconnects food chains within an ecological community |
| trophic level | position of an organism occupies in a food web or food chain starting with producers through the highest level of consumer |
| energy pyramids | shows the amount of energy passed from one trophic level to the next, from the bottom(producers) to the top(highest level consumer) |
| 10% rule | says that about 10% of energy from each level reaches the level above it; use energy pyramids |
| matter | makes up all things; basic elements and compounds make up all living things |
| water cycle | cycling of water between the atmosphere and the oceans, rivers, lakes |
| nitrogen cycle | nitrogen is needed for the building blocks of life; natural cycling of nitrogen from the air into useable nitrogen in the soil |
| carbon cycle | found in all parts of our planet; we release carbon in the form of carbon dioxide as waste plants use it and release oxygen |
| oxygen cycle | helps organisms grow, reproduce, and turn food into energy; available by plants as they release oxygen into the air as a waste product from photosynthesis |
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