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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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Food chains and food webs

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Paper 3Theory (Core)2 marks

Understanding food chains and energy flow.

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Food Chain Example

In a simple food chain, grass is eaten by rabbits, and rabbits are eaten by foxes.

  1. a

    Explain how energy flows through this food chain.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)3 marks

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Energy Loss in Food Chains

Discuss the implications of energy loss at each trophic level in a food chain.

  1. a

    Discuss the impact of energy loss on the number of trophic levels in a food chain.

    Aim for approximately 3 distinct marking points.

    [3]