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Cambridge IGCSE Biology practice

Paper 3 structured question: Energy flow

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Energy flow

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Paper 3Theory (Core)1 marks

Energy in biological systems

Description

The Sun as an energy source

The Sun provides energy that supports life on Earth. Plants use this energy to make food, which then supports animals and other organisms.

  1. a

    State the main source of energy for biological systems.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)1 marks

Description

Energy transfer

Plants capture energy from the Sun and convert it into chemical energy through photosynthesis. Animals then obtain energy by eating plants or other animals.

  1. a

    Identify how energy from the Sun enters biological systems.

    Aim for approximately 1 distinct marking point.

    [1]