9/14 Heat Transfer Mechanisms

Make your microwave popcorn.   (Yes, you will need to take turns)

• When  you pull the bag out of the microwave,   Check it for

• radiation transfer
• conduction transfer
• convection transfer

Write EVIDENCE you observe for each type of the transfer?  Record in your notes

• The teacher is making popcorn using an older, more traditional stove top method.  If you come near the pan, what EVIDENCE can you observe for the types of transfer?  Again, write in your notes.

Take a look at this slide show, which focuses on heat transfer methods.   How are these ideas similar or different to the ones you have already?

Popcorn from silviavuong

Heat transfer is all around us.   Use the simulation from 2D to explore this further.  For each problem, answer the question and tell me the name of the simulation.

1. Will a wind mill work better in the summer or the winter?  Explain, using the idea of convection.
2. Answer the questions on p. 30 of the pdf book.
3. Answer the questions on the Analysis of p. 35
4. Answer the questions on p. 41 about wall thickness.
5. Complete the model question on  p. 42

To find out how a microwave works, click the picture

Click to Run

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Part 2:   Heat Transfer and Weather

One last time....pictures

We're going to apply this idea of heat transfer to weather.

1.  Look at the pictures   What does re-radiation mean?   How does a cloudy night  change the temperature of the area?