2.3.2 Convection (3)

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1.

A metal block is placed in a container of water at a constant temperature. Explain how thermal energy is transferred from the water to the metal block. Consider the different methods of thermal energy transfer and explain why convection is not the primary method in this situation.

2.

Describe an experiment to illustrate convection in a gas. Include a list of materials needed, the procedure, and what observations you would expect to make. (6 marks)

3.

Explain how convection currents contribute to the warmth within a room heated by a central heating system. Include a description of the temperature gradient and the role of different gases in the process.