organism that captures energy from sunlight or inorganic substances to produce its own food provides the foundation of the food supply for other organism; also called a producer

organism that cannot make its own food and gets in nutrients and energy requirements by feeding on other organisms also called a consumer

heterotroph that eats only plants

heterotroph that preys on other heterotrophs

heterotroph that consumes both plants and animals

heterotroph that decomposes organic material and returns the nutrients to soil, air, and water, making the nutrient available to other organism

each step in a food chain or food web

simplified model that shows a single path for energy flow through an ecosystems

model that shows many interconnected food chain and pathways in which energy and matter flow through an ecosystem

total mass of living matter at each trophic level

anything that takes up space and has mass

chemical substance that living organisms obtain from the environment to carry out life processes and sustain life

exchange of matter through the biosphere involving living organisms, chemical processes, and geological processes

process in which nitrogen gas is captured and converted into a form plant can use

process in which fix nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere

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chapt 2&3 vocabulary

Term	Definition
autotroph	organism that captures energy from sunlight or inorganic substances to produce its own food provides the foundation of the food supply for other organism; also called a producer
heterotroph	organism that cannot make its own food and gets in nutrients and energy requirements by feeding on other organisms also called a consumer
herbivore	heterotroph that eats only plants
carnivore	heterotroph that preys on other heterotrophs
omnivore	heterotroph that consumes both plants and animals
detritivore	heterotroph that decomposes organic material and returns the nutrients to soil, air, and water, making the nutrient available to other organism
trophic level	each step in a food chain or food web
food chain	simplified model that shows a single path for energy flow through an ecosystems
food web	model that shows many interconnected food chain and pathways in which energy and matter flow through an ecosystem
biomass	total mass of living matter at each trophic level
matter	anything that takes up space and has mass
nutrient	chemical substance that living organisms obtain from the environment to carry out life processes and sustain life
biogeochemical cycle	exchange of matter through the biosphere involving living organisms, chemical processes, and geological processes
nitrogen fixation	process in which nitrogen gas is captured and converted into a form plant can use
denitrification	process in which fix nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere

Created by: user-1579294

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