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chapter 20

TermDefinition
ecosystem is all the living things and nonliving things in a given area
biotic factor are the living things in an ecosystem
abiotic factor are the nonliving things I'm an ecosystem, such as sunlight and water
climate describes average weather conditions in an area over time
atmosphere is the layer of gases that surrounds earth
evaporation is the process during which liquid water changes into a gas called water vapor
condensation is the process during which water vapor changes into liquid water
precipitation water that falls from clouds to Earth's surface is called
nitrogen fixation the process that changes atmospheric nitrogen into nitrogen compounds that are usable by living things is called
photosynthesis is a series of chemical reactions that convert light energy, water, and carbon dioxide into the food energy molecule glucose give off oxygen
chemosynthesis is the process during which producers use chemical energy in matter rather than light energy and make food
food chain is a model that shows how energy flows in an ecosystem through feeding relationships
food web scientists use a model of energy transfer called a food web to show how food chains in community are interconnected
energy pyramid scientists use a model called an energy pyramid to show the amount of energy available in each step of a food chain
Created by: star K
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