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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Carbon cycle

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Carbon cycle

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Paper 3Theory (Core)2 marks

The carbon cycle is essential for life on Earth.

Description

The Carbon Cycle

The carbon cycle involves processes such as photosynthesis, respiration, feeding, decomposition, the creation of fossil fuels, and combustion.

  1. a

    Explain the role of photosynthesis in the carbon cycle.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Carbon cycle

Paper 3Theory (Core)4 marks

Description

Human Impact on Carbon Cycle

Human activities such as burning fossil fuels and deforestation significantly affect the carbon cycle.

  1. a

    Discuss the effects of combustion of fossil fuels on the carbon cycle.

    Aim for approximately 4 distinct marking points.

    [4]