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Learning objective

Explain diffusion as the overall movement of particles from areas of higher concentration to areas of lower concentration due to their random motion.

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Cambridge IGCSE Combined ScienceMovement into and out of cellsCore content

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Explain diffusion as the overall movement of particles from areas of higher concentration to areas of lower concentration due to their random motion

  • This point belongs to Diffusion, especially Diffusion outcomes.
  • You need to be able to explain diffusion as the overall movement of particles from areas of higher concentration to areas of lower concentration due to their random motion.
  • 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.

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Describe

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Paper 3 structured question: Diffusion

Paper 3Theory (Core)2 marks

Description

Diffusion of Food Coloring in Water

When a drop of food coloring is added to a glass of water, it spreads out over time until the color is evenly distributed throughout the water.

  1. a

    Describe the process of diffusion observed in this experiment.

    Aim for approximately 2 distinct marking points.

    [2]
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