1. HEAT TRANSFER IN THE MANTLE How is heat transferred?

2. What are the 3 ways that heat is transferred? Radiation Conduction Convection

3. Radiation Heat transferred by EM waves through space EX: Sitting by the fire!

4. Conduction Heat transferred through direct contact EX: Spoon in hot chocolate

5. Convection Heat transferred through a fluid movement of either a gas or liquid EX: Chicken noodle soup heating on the stove!

6. Which of these do you think happens in Earth’s mantle? Convection! Convection currents flow in the asthenosphere Heated material rises to the top of the mantle (lithosphere), cools, then sinks back to the bottom

7. Convection Currents The middle mantle "flows" because of convection currents. Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling and sinking again --repeating this cycle over and over.

9. That’s it!!!