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Learning objective

Explain how energy moves through living organisms, starting from light energy from the Sun, converting to chemical energy within organisms, and ultimately being transferred to the environment.

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

Exam focus

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

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Quick explanation

Explain how energy moves through living organisms, starting from light energy from the Sun, converting to chemical energy within organisms, and ultimately being transferred to the environment

  • This point belongs to Energy flow, especially Energy flow outcomes.
  • You need to be able to explain how energy moves through living organisms, starting from light energy from the Sun, converting to chemical energy within organisms, and ultimately being transferred to the environment.
  • The key ideas to know are Describe and Explain.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplain

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)3 marks

Description

Energy Flow in Ecosystems

Energy from the Sun is captured by plants and transferred through various trophic levels in an ecosystem.

  1. a

    Explain how energy is transferred from the Sun to herbivores in an ecosystem.

    Aim for approximately 3 distinct marking points.

    [3]
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