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Cambridge IGCSE Combined Science practice

What is the primary source of energy for all living organisms?

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Show answerEnergy flow revisionRevise the key idea

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MCQ

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cambridge_mcq

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Topic

Energy flow

Exam-style question

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What is the primary source of energy for all living organisms?.

  1. A.The Moon
  2. B.The Sun
  3. C.The Earth
  4. D.Stars

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)3 marks

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]