Monday, November Warm-Up

1. How do unpoppedpopcorn kernels change to popped kernels? Monday, November Warm-Up

2. Popcorn needs heat to pop--between 400 to 450 degrees Fahrenheit. Inside the kernel is starch and moisture. When heated, the moisture turns to steam, which builds pressure inside the kernel. The pressure increases until the kernel ruptures, turning the kernel inside out. Yum!

3. MYP Unit Question: How does land change? Area of Interaction: Environment Learner Profile: Thinker Standard: Investigate the scientific process of how the Earth's surface is made. Learning Target: Today I’m learning about heat transfer because it will help m e to understand how things on earth heat up.

4. Types of Heat Transfer

5. Earth’s molten outer core is nearly as hot as the surface of the sun. Heat is transferred from the core to the surface of the Earth through liquids and solids. Heat Transfer Trivia – Do NOT copy this information.

6. Heat Transfer – is the movement of energy from a warmer object to a cooler object. Heat Transfer What is heat transfer?

7. There are three types of heat transfer: • Convection • Radiation • Conduction Heat Transfer What are the types of heat transfer?

8. Example: • Sunlight is radiation that warms the Earth’s surface • Heat you feel from around an open flame or fire Radiation Radiation

9. Radiation: is the transfer of energy through empty space. Radiation What is radiation?

10. Conduction: is heat transfer by direct contact of particles of matter. Conduction What is conduction?

11. Example: • Heat is transferred from the hot soup and the pot to the particles that make up the spoon. Conduction Heat transferred to the particles of the spoon from the pot and hot water

12. Convection: isheat transfer by the movement of a heated fluid. Convection What is convection?

13. Convection Current • cooler fluid continually sinks to the bottom • warmer fluid continually rises to the top. Convection Current What is a convection current?

14. Convection

15. differences of temperature and density within a fluid. • Density - Is a measure of how much mass there is in a volume of a substance. Convection What causes convection? What is density?

16. Convection Current Demo Simon Says “Convection Currents” HOMEWORK: Finish the Heat Transfer Worksheet Closing:

17. The heating and cooling of the fluid, changes in the fluid’s density and the force of gravity combine to set convection currents in motion. Convection Current What sets convection currents in motion?

18. Earth’s mantle responds to heat. • Convection currents flow in the Asthenosphere. • The heat source for these currents come from the Earth’s core and from the mantle itself. Convection and the Earth’s Mantle Where does the heat source for the Earth’s currents come from?

19. Convection and the Earth’s Mantle

20. Convection and the Earth’s Mantle

21. Stuff to do: Complete the Heat Transfer concept map on the back of your note page. If you didn’t begin or finish the Earth’s interior worksheet from yesterday pick it up from the red box and complete it. Once you have finished Earth’s interior, pick up a What’s happening during convection? Worksheet. DO NOT WRITE ON THESE WORKSHEETS!!!! ALL YOUR WORK MUST BE DONE IN YOUR SCIENCE NOTEBOOK!

22. 8th Grade Exit Slip 09/14/10 Answer the following question: What are the three types of heat transfer?