Topic 5 Study Material Ecosystems

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What is the nitrogen cycle?

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The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms, including nitrogen fixation, nitrification, denitrification, and ammonification, allowing nitrogen to be used by living organisms.

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What is nitrogen fixation?

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Nitrogen fixation is the process by which bacteria convert free nitrogen (N2) from the atmosphere into ammonia (NH3) or related compounds, making nitrogen available for plants.

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What is an organism?

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An organism is a single living thing, such as a plant, animal, or microorganism.

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What is a population?

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A population is a group of individuals of the same species living in a specific area.

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What is a community?

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A community is a group of different species that live together in a specific area and interact with each other.

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What is an ecosystem?

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An ecosystem is a community of living organisms (biotic factors) and their physical environment (abiotic factors) interacting as a system.

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What are abiotic factors?

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Abiotic factors are the non-living components of an ecosystem, such as temperature, light, air, water, and soil.

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What are biotic factors?

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Biotic factors are the living components of an ecosystem, including plants, animals, and microorganisms.

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Give an example of an abiotic factor.

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Water is an example of an abiotic factor.

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Give an example of a biotic factor.

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A rabbit is an example of a biotic factor.