Drift and Tectonics Word Scramble
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Term | Definition |
continental drift | Wegner's theory that Earth's continents were once joined in a single landmass and gradually moved apart |
Pangaea | Wegner's name for the supercontinent |
mid-ocean ridge | underwater mountain ranges |
convection | energy transfer by the movement of a material |
convection currents | sinking and rising motion that occurs through the transfer of heat energy |
theory of plate tectonics | theory that states that Earth's lithosphere is made up of huge plates that move over the surface of the Earth |
divergent boundary | occurs where plates move/pull apart |
convergent boundary | occurs where plates move/push together |
transform boundary | occurs where plates scrape/slide by one another |
rift valley | happens where ridges continue to widen and create a gap and molten material rises to build new crust |
magnetic reversal | where the North and South Poles switch position |
hot spots | where heated rock rises in plumes or thin columns from the mantle |
subduction | one plate sinks beneath another |
continental-continental collision | 2 continental plates carrying continental crust push together forming mountains |
oceanic-oceanic subduction | 2 oceanic plates come together as one sinks beneath the other due to density (forms ocean trenches and island arcs) |
oceanic-continental subduction | when oceanic crust sinks under continental crust (forms deep ocean trenches and coastal mountains) |
Created by:
Ms. Long 6
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