1. ENERGY TRANSFER

2. ENERGY TRANSFER
THERE ARE THREE DIFFERENT WAYS THAT ENERGY IS TRANSFERRED.
CONDUCTION
CONVECTION
RADIATION

3. ENERGY TRANSFER
If there is a temperature difference in a system, heat will naturally move from high to low temperatures.

4. HEAT WHAT?
Heat source - The place you find the higher temperature is the heat source
Heat sink - The area where the temperature is lower is the heat sink

5. CONDUCTION THE TRANSFER OF HEAT DUE TO DIRECT CONTACT. Ex. THE BURNER
ON THE STOVE AND A
FRYING PAN.

6. Conduction
The heat source and heat sink are touching.

7. CONVECTION
THE UP AND DOWN CIRCULAR MOVEMENT OF GASES AND LIQUIDS CAUSED BY HEAT TRANSFER

8. CONVECTION WHY CONVECTION HAPPENS HOT AIR IS LESS DENSE- SO IT RISES
COLD AIR IS MORE DENSE – SO IT SINKS
There is a lot of movement in convection.

9. CONVECTION
HOT RISES
COLD SINKS

10. CONVECTION HAPPENS
CONVECTION IS HAPPENING ALL OVER THE PLANET. HERE ARE A FEW:
THE AIR
OCEANS
IN A HOUSE
IN A CUP OF HOT CHOCOLATE
INSIDE THE EARTH

11. RADIATION WHEN ELECTROMAGNETIC WAVES COME IN CONTACT
WITH AN OBJECT THE WAVES
TRANSFER THE HEAT TO THAT OBJECT.
Energy that travels and spreads out as it goes.

12. RADIATION
2 EVERYDAY EXAMPLES.
THE MICROWAVE

13. RADIATION
EVERYDAY EXAMPLE
THE SUN

14. Everyday Energy Transfer
Come up with 5 different ways that energy transfer occurs in your home?

15. POPCORN ENERGY
USING POPCORN TO DEMONSTRATE THE THREE TYPES OF ENERGY TRANSFER
CONDUCTION – JIFFY POP ON THE STOVE

16. POPCORN ENERGY
AIR POPPED POPCORN
CONVECTION

17. POPCORN ENERGY
MICROWAVE POPCORN
RADIATION