Teacher Input 4
- Ask the learners what happens when they hold their hand above:
- a fire at a braai (show the fire lighters);
- a candle that is burning (light the candle);
- a heater that is switched on (switch the heater on);
- an electric stove that is switched on. (Possible answers: heat of the candle flame / heat from the coals of the fire/ heat from the stove’s plate/ etc.).
- Show Video Clip 3: Econo-Heat - The world's most economical heating panel. (3:10 min.).
- Present an overview of convection by using: Presentation 4: Convection
- Hand out Worksheet C: Investigating convection.
- Remind the class that they will work in groups and everyone must participate.
- Emphasize that they must work carefully with the equipment when they pack it out and pack it away.
Learner Activity 3
- Learners complete Worksheet C.
- Teacher to use WORKSHEET C: Memorandum to mark the learners’ work.
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