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Integrated Science · Grade 9
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Ecosystems, Food Chains and the Nitrogen Cycle — Key Terms
Match each term to its definition.
Ecosystem
— match —
A community of living organisms interacting with their non-living environment.
An organism, usually a green plant, that makes food and starts a food chain.
Several interconnected food chains in an ecosystem.
An organism such as bacteria or fungi that breaks down dead matter and recycles nutrients.
The conversion of nitrogen gas into compounds plants can use, often by bacteria.
Producer
— match —
A community of living organisms interacting with their non-living environment.
An organism, usually a green plant, that makes food and starts a food chain.
Several interconnected food chains in an ecosystem.
An organism such as bacteria or fungi that breaks down dead matter and recycles nutrients.
The conversion of nitrogen gas into compounds plants can use, often by bacteria.
Food web
— match —
A community of living organisms interacting with their non-living environment.
An organism, usually a green plant, that makes food and starts a food chain.
Several interconnected food chains in an ecosystem.
An organism such as bacteria or fungi that breaks down dead matter and recycles nutrients.
The conversion of nitrogen gas into compounds plants can use, often by bacteria.
Decomposer
— match —
A community of living organisms interacting with their non-living environment.
An organism, usually a green plant, that makes food and starts a food chain.
Several interconnected food chains in an ecosystem.
An organism such as bacteria or fungi that breaks down dead matter and recycles nutrients.
The conversion of nitrogen gas into compounds plants can use, often by bacteria.
Nitrogen fixation
— match —
A community of living organisms interacting with their non-living environment.
An organism, usually a green plant, that makes food and starts a food chain.
Several interconnected food chains in an ecosystem.
An organism such as bacteria or fungi that breaks down dead matter and recycles nutrients.
The conversion of nitrogen gas into compounds plants can use, often by bacteria.
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