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Transcript
Convection Currents and the Mantle
Heat transfer is the movement of heat from a warmer object to a cooler
object. There are three ways in which heat can be transferred; conduction,
convection and/or radiation. Click on the links below and answer the
questions that follow.
Convection, Conduction and Radiation & Heat Transfer
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How is heat transferred by conduction?
Explain the process of convection.
How is heat transferred by radiation?
If air is a fluid, why isn't convection responsible for transferring heat
to Earth from the sun?
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Test your knowledge! Scroll back to the top of the Heat Transfer Web page
and take the "Mini Quiz".
As you already know, the earth's mantle contains two layers; the
stratosphere (tough liquid part of the outer mantle) and the lithosphere (the
stiffer outer mantle and the crust). Because of the intense pressure and
temperature in the mantle convection currents occur. To learn about what
influence these convection currents have on Earth, read the Web page below
and answer the questions that follow.
The Mantle
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Describe how convection currents occur in Earth's mantle.
What is a constructive force caused by the convection currents in the
earth's mantle?
What is a destructive force caused by the convection currents in the
earth's mantle?