1. Conduction and Convection
22/11/2018
Conduction and Convection
Objective
To describe conduction and convection as processes of energy transfer in terms of the particle model.

2. Observing conduction
I think the ice cube on the _______ will melt first.
Setup and then come back later in the lesson to see what is happening.

3. Conduction
The particles at the hot end of a solid rod have more energy so they vibrate more. They bump into their neighbours and share the energy causing them to vibrate more. The heat energy is passed along the rod.

4. Observing convection
Setup demonstration to show convection.

5. Convection
When a liquid or gas is heated it expands and becomes less dense. This causes it to float upwards, it is replaced by the colder fluid above it. The colder fluid is then heated so it rises. The hot fluid cools and therefore it sinks.

6. Investigating conduction
You will compare how well three metals conduct heat (thermal) energy.
Use the worksheet to:
Understand the method
Assess the risks
Record your results
Reach a conclusion
Use ss_th2_phys_term 4_l6_worksheet for the pupils practical work.

7. Homework Complete the answers to the questions in your books.
(ss_th2_phys_term 4_l6_sq_heat_q2) Structure heat question 2 should be set for homework.

8. Plenary/Extension
Write two sentences to explain how all of the water in a pan is heated.