1. Transfer of Heat Part 1 Lesson 16

2. Does heat energy behave in predictable ways?

3. Yes, heat energy does behave in predictable ways
Yes, heat energy does behave in predictable ways. Heat will always flow in one direction from hot to cold.

4. How does heat move from one place to another?

5. Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.

6. When there is a temperature difference, heat will always move from higher to lower temperatures.

7. Conduction occurs when two object at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature.

8. The two objects here are the fire and the metal
The two objects here are the fire and the metal. The metal will slowly heat up until it is the same temperature as the fire.

9. Conductors: A good conductor of heat is a material that transfers heat energy from a region of higher temperature to a region of lower temperature faster.

10. Metals are good conductors of heat such as copper, gold and aluminum
Metals are good conductors of heat such as copper, gold and aluminum. Wood is not a good conductor of heat.

12. When warmer things are put with cooler things, the warmer things lose heat and the cool things gain it until they are all at the same temperature.
The cool spoon will heat up when it sits in the hot coffee. The spoon will gets warmer, the coffee will get cooler.

13. Just to recap, conduction is the transfer of thermal energy between things that are touching.

14. Conduction can happen within one object
Conduction can happen within one object. (For example, thermal energy can be conducted through the handle of a metal pot.)

15. Let’s watch this video about conduction.

16. Another way heat moves from one place to another is through Convection.

17. Convection is the movement of thermal energy by the movement of liquids or gases.

18. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas.

19. As this happens, cooler liquid or gas takes the place of the warmer areas which have risen higher.

20. This cycle results in a continuous circulation pattern and heat is transferred to cooler areas.

21. You see convection when you boil water in a pan
You see convection when you boil water in a pan. The bubbles of water that rise are the hotter parts of the water rising to the cooler area of water at the top of the pan.

22. You have probably heard the expression "Hot air rises and cool air falls to take its place" - this is a description of convection in our atmosphere.

23. Heat energy is transferred by the circulation of the air.

24. Convection in the oceans and atmosphere helps to move thermal energy around Earth, and is an important factor influencing weather and climate.

25. Let’s watch this video about convection.

26. Let’s review what we have learned so far about heat transfer
Let’s review what we have learned so far about heat transfer. Answer the attached questions on the worksheet entitled L#16 Heat Transfer.

27. In our next lesson we will learn another way heat moves from one place to another. We will learn about radiation.

28. Good Job Today!
And remember to….

29. See you next time!