Cambridge IGCSE Combined Science practice

Paper 6 structured question: Transfer of thermal energy

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Transfer of thermal energy

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Paper 6Alternative to PracticalPractical1 marks

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

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 Type	Initial Temperature (°C)	Final Temperature (°C)	Temperature Change (°C)
Black	20	60	40
White	20	50	30
Shiny	20	40	20

a
State the independent variable in this experiment.
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