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abiotic factors
lesson 1 chapter 20
Term | Definition |
---|---|
ecosystem | all the living things and non-living things in a given area |
biotic factor | the living things in a ecosystem |
abiotic factor | nonliving things in a ecosystem |
climate | describes average weather in a area over time |
atmosphere | the layer of gases that surround earth |
evaporation | liquid water changes into gas called water vapor |
condensation | water vapor changes into liquid water |
precipitation | water that falls from clouds onto earths surface |
nitrogen fixation | changes atmospheric nitrogen compounds that are usable by living things |
photosynthesis | series of chemical reactions that convert light energy,water,and carbon dioxide into the food-energy molecule gluclose and give off oxygen |
chemosynthesis | producers use chemical in matter rather than light energy and make food |
food chain | a model that shows how energy flows in a ecosystem through feeding relationships |
food web | shows how food chains in a community are interconnected |
energy pyramid | shows the amount of energy available in each step of a food chain |