Edexcel IGCSE Physics 4.6 Thermal Energy Transfer Questions

Practise explaining conduction, convection and radiation by choosing the transfer model that fits particles, contact, vacuum or temperature change.

Exam points

explain conduction through metals using particle vibrations or delocalised electrons
distinguish conduction from convection by using contact, particle movement and temperature difference
explain why energy from the Sun reaches Earth by radiation rather than conduction or convection

[Maximum number: 4]

A student pours a known volume of hot water into a metal container. They place the metal container into an insulated plastic cup containing an equal volume of cold water.

Figure for Question Edexcel IGCSE Physics 4.6 Thermal Energy Transfer Questions question 1 — Edexcel IGCSE Physics

The student uses temperature probes to measure the temperatures of both the water in the metal container and the water in the plastic cup.

The het water has an initial temperature of $70^{\circ} \mathrm{C}$ and the cold water has an initial temperature of $5^{\circ} \mathrm{C}$ .

Explain why the temperatures of the hot water and the cold water change.

You should refer to different types of thermal energy transfer in your answer.

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Edexcel IGCSE Physics 4.6 Thermal Energy Transfer Questions question 1