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Cambridge IGCSE Physics practice

Paper 4 structured question: Radiation

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Radiation

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Paper 4Theory (Extended)1 marks

The Earth's temperature is influenced by various factors that affect the balance of incoming solar radiation and outgoing infrared radiation.

Description

Factors Affecting Earth's Temperature

The balance between incoming and outgoing radiation is crucial for maintaining Earth's temperature. Factors such as greenhouse gases, solar output, and surface albedo play significant roles in this balance.

  1. a

    State one factor that affects the balance of radiation on Earth.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Radiation

Paper 4Theory (Extended)2 marks

Description

Understanding the Greenhouse Effect

The greenhouse effect occurs when the sun's energy reaches the Earth and some of it is reflected back to space while the rest is absorbed and re-radiated as infrared energy. Greenhouse gases trap some of this energy, keeping the Earth warm.

  1. a

    State two greenhouse gases that contribute to the greenhouse effect.

    Aim for approximately 2 distinct marking points.

    [2]