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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Food chains and food webs

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Attempt questionFood chains and food webs revisionRevise the key idea

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3

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Food chains and food webs

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Paper 3Theory (Core)3 marks

The role of decomposers in ecosystems is crucial for nutrient cycling.

Description

Decomposers in Ecosystems

Decomposers break down dead organic matter, returning nutrients to the soil and supporting plant growth.

  1. a

    Explain the importance of decomposers in maintaining ecosystem health.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)3 marks

Description

Decomposers and the Carbon Cycle

Decomposers break down organic matter, releasing carbon back into the atmosphere.

  1. a

    Discuss how decomposers contribute to the carbon cycle.

    Aim for approximately 3 distinct marking points.

    [3]