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Learning objective

Explore and comprehend the necessity of chlorophyll, light, and carbon dioxide for the process of photosynthesis.

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

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Combined SciencePlant nutritionCore contentPractical objective

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Quick explanation

Explore and comprehend the necessity of chlorophyll, light, and carbon dioxide for the process of photosynthesis

  • This point belongs to Photosynthesis, especially Photosynthesis outcomes.
  • You need to be able to explore and comprehend the necessity of chlorophyll, light, and carbon dioxide for the process of photosynthesis.
  • The key ideas to know are Demonstrate and Discuss.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DemonstrateDiscuss

Why it matters

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

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Practice Questions7 linked questions

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Paper 6 structured question: Photosynthesis

Paper 6Alternative to PracticalPractical1 marks

Method

Method to Investigate Photosynthesis

1. Set up a beaker with water and a sprig of Elodea. 2. Place a lamp at varying distances from the beaker. 3. Count the number of oxygen bubbles produced in one minute at each distance.

Distance from lamp (cm)Number of bubbles produced
1015
2010
305
  1. a

    State the independent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]
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