9­7 Convection and the Mantle.notebook
September 22, 2011
Science Energizer
What is a convection current?
Answer: The flow that transfers heat within a fluid. 3 kinds of heat transfer
1. radiation
2. conduction
3. convection
1
9­7 Convection and the Mantle.notebook
September 22, 2011
Radiation
Transfer of energy through space
Conduction
Heat transfer within a material or between materials that are touching
2
9­7 Convection and the Mantle.notebook
September 22, 2011
Convection
Heat transferred by the movement of currents within a fluid
Did you know that there are convection currents in Earth?
Use your foldable to write your notes for this presentation!
In Earth's mantle, large amounts of heat are transferred by convection currents. 3
9­7 Convection and the Mantle.notebook
September 22, 2011
Heat from the core and the mantle itself causes convection currents in the mantle. ssible o
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How rock to
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Over millions of years, the great heat and pressure in the mantle cause solid mantle rock to flow very slowly. 4
9­7 Convection and the Mantle.notebook
1. Geologists believe that mantle rock rises slowly from the bottom of the mantle toward the top. September 22, 2011
2.The hot rock eventually cools and sinks back through the mantle. 3.This repeats and over and over, the cycle of rising and sinking takes place.
Science Journal
1. Predict what you think will happen when each of the containers of water are added.
2. Describe what happened when the two containers were added to the glass container
3. Why does the water in each container flow the way it did?
4. How does this show what happens in the mantle
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