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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

The role of producers in ecosystems is crucial for energy flow.

Description

Producers in Ecosystems

Producers are organisms that create their own organic nutrients through photosynthesis, using sunlight as their energy source. They form the base of the food chain, providing energy for consumers.

  1. a

    Explain the importance of producers in an ecosystem.

    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

Description

Producers and the Carbon Cycle

Producers absorb carbon dioxide from the atmosphere and release oxygen during photosynthesis, playing a vital role in the carbon cycle.

  1. a

    Discuss the role of producers in the carbon cycle.

    Aim for approximately 3 distinct marking points.

    [3]