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Learning objective

Explain how energy moves through living organisms, starting from sunlight and 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 BiologyOrganisms and their environmentCore content

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Quick explanation

Explain how energy moves through living organisms, starting from sunlight and 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 sunlight and chemical energy within organisms, and ultimately being transferred to the environment.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Describe

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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Practice Questions7 linked questions

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)2 marks

Diagram Description

Energy flow in an ecosystem

The diagram shows energy moving from sunlight to plants, then to herbivores, then to carnivores, and finally energy lost to the environment.

SourceEnergy form
SunlightLight energy
PlantsChemical energy
HerbivoresChemical energy
CarnivoresChemical energy
EnvironmentHeat energy
  1. a

    Describe how energy moves through living organisms starting from sunlight.

    Aim for approximately 2 distinct marking points.

    [2]
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