Can you help me with this questions?

Question

I dont know how how to approach to these question.

The mystery of the spinning pinwheel

Festive ornaments are usually made of metal. When the candles beneath the pin wheel are lit, the pinwheel begins to spin.


1) What energy transformation or transfers are occurring?

2) what property of the air is being applied to make this device work? (spin)

Answer 1

1) The air under the wheel is heated.

2) Heated air becomes less dense and rises. The current of rising air (convection) "blows" on the wheel gently.