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Cambridge IGCSE Combined Science practice

What is the main driving force behind diffusion?

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MCQ

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cambridge_mcq

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Topic

Diffusion

Exam-style question

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What is the main driving force behind diffusion?.

  1. A.Temperature
  2. B.Pressure
  3. C.Random motion of particles
  4. D.Concentration gradient

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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]