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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Energy flow

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Attempt questionEnergy flow revisionRevise the key idea

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Energy flow

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Paper 3Theory (Core)3 marks

The role of the Sun in ecosystems is crucial for sustaining life.

Description

The Sun's Role in Energy Transfer

The Sun provides energy that is essential for photosynthesis, which is the foundation of food chains.

  1. a

    Explain the importance of the Sun as the main energy source for biological systems.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)4 marks

Description

Energy Flow in Ecosystems

The Sun's energy is captured by plants and transferred through the food web.

  1. a

    Describe how energy from the Sun is transferred through an ecosystem.

    Aim for approximately 4 distinct marking points.

    [4]