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Cambridge IGCSE Combined Science practice

Paper 6 structured question: Transfer of thermal energy

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Transfer of thermal energy

Exam-style question

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Paper 6Alternative to PracticalPractical3 marks

An experiment is conducted to compare the thermal radiation emission of different surfaces.

Results Table

Results of Thermal Radiation Experiment

The table shows the temperature changes of different surfaces after being heated.

Surface TypeTemperature Change (°C)
Black40
White30
Shiny20
  1. a

    Describe the results shown in the table.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 6 structured question: Transfer of thermal energy

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Method

Experiment to Test Thermal Radiation Emission

In this experiment, different surfaces (black, white, and shiny) are heated under a lamp. The temperature of each surface is measured after 5 minutes.

Surface TypeInitial Temperature (°C)Final Temperature (°C)Temperature Change (°C)
Black206040
White205030
Shiny204020
  1. a

    State the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]