Vocabulary

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Arenal volcano, Costa Rica. Photo courtesy of Clearly Ambiguous/Flickr.
Licensed CC BY.

Convection: process in which material is circulated by heat.


Convection Current: process in Earth's mantle that drives tectonic plate movement. It is associated with heat transfer taking place in Earth's mantle.It occurs because of density differences in Earth's materials.


Plate tectonics: theory that the Earth's crust is moving as a series of large chunks. It combines the ideas of continental drift and seafloor spreading.


Tectonic plate: large parts of the lithosphere.


Subduction: process in which one plate moves beneath another. Occurs at convergent plate boundaries.



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Last modified: Sunday, 12 October 2014, 11:19 PM