4.6 recall that energy transfer may take place by conduction, convection and radiation Task 1
· Try the animation: particle model - conduction
· Extension: what is the limitation of this animation? (Check your answer with the Heating a Solid animation)
Answer: The limitation is that you cannot change the temperature since the fire is lit by a match. Task 2
· Try the quiz on the Cooking animation
· Extension: what's the mistake in the description of convection? Answer: The correct description should be that when the molecules at the bottom are heated, they expand are rise up. When they are on top, they cool down and move back to the bottom. This cause the convection. 
· Try the animation: particle model - conduction
· Extension: what is the limitation of this animation? (Check your answer with the Heating a Solid animation)
Answer: The limitation is that you cannot change the temperature since the fire is lit by a match. Task 2
· Try the quiz on the Cooking animation
· Extension: what's the mistake in the description of convection? Answer: The correct description should be that when the molecules at the bottom are heated, they expand are rise up. When they are on top, they cool down and move back to the bottom. This cause the convection.
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