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Learning objective

Identify the Sun as the main source of energy for biological systems.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE BiologyOrganisms and their environmentCore content

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Quick explanation

Identify the Sun as the main source of energy for biological systems

  • This point belongs to Energy flow, especially Energy flow outcomes.
  • You need to be able to identify the Sun as the main source of energy for biological systems.
  • The key ideas to know are State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

Why it matters

This objective helps connect Energy flow outcomes to exam-style questions, flashcards, and revision notes for Energy flow.

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)1 marks

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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Cambridge IGCSEBiology resources