1. Solar Ovens By: Juan Gomez Perry Francois-Edwards Luis Perez

2. Outline Intro Insulators Hypothesis 3 Modes of Heat Transfer Procedure Results Conclusion

3. Introduction Project Theme: thermal energy/energy transfer Built a solar oven using 3 insulators:  Cotton  Styrofoam  Newspaper

4. Insulators A material that does not allow energy transfer For our experiment, the insulator kept the heat inside the box Thermal Conductivities: Cotton balls: 0.030 W/m-K Newspaper: 0.050 W/m-K Styrofoam: 0.033 W/m-K

5. Hypothesis The insulator with the lowest value of thermal conductivity would be the most efficient insulator Cotton should win!

6. Heat Transfer Energy in the form of heat Conduction Convection Radiation

7. Conduction The heat transfer that occurs when a temperature difference exists in a stationary medium

8. Convection The heat transfer between a surface and a moving fluid that are different temperatures

9. Radiation The heat transfer of all surfaces of finite temperature emitted in the form of electromagnetic waves

10. Materials Pizza boxes Aluminum foil Black foam board Plastic Wrap Tape Glue Knives Scissors Sticks Thermometers Insulators Ingredients for S’mores

11. Procedure

15. Results

17. Conclusions Because cotton had the lowest thermal conductivity, it was the most effective insulator.

18. For Your Time