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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Diffusion

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Diffusion

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Paper 3Theory (Core)3 marks

Diffusion in gases

Description

Diffusion of Perfume in Air

When perfume is sprayed in one corner of a room, the scent gradually spreads throughout the room.

  1. a

    Explain how diffusion occurs in this scenario.

    Aim for approximately 3 distinct marking points.

    [3]

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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]