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CE Top 2, Exp 1-3

TermDefinition
theory an explanation for why a phenomenon changes
continental drift the idea that continents were once fused together but slowly drifted apart over time
tectonic plates more than a dozen distinct plates that make up Earth's surface and slowly move in different directions
mid-ocean ridge an undersea ocean chain where new ocean floor is produced;a divergent plate boundary under the ocean
seafloor spreading the process by which molten material adds new oceanic crust to the ocean floor
subduction the process by which oceanic crust beneath a deep-oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
ocean trench an undersea valley that represents one of the deepest parts of the ocean
convection current a type of thermal energy transfer in which differences in temperature and density of fluids make them rise and fall
boundary a line that marks the limits of an area
convergent boundary boundary where two tectonic plates move together, or converge
divergent boundary boundary where two tectonic plates move away from one another
transform boundary boundary where tectonic plates slide past each other in opposite directions
fault a break in the rock of Earth’s crust or mantle
catastrophic causing great or sudden damage or change
earthquake shaking and trembling that result from tectonic plate movement
seismic waves vibrations that travel through Earth carrying energy
landslide a rapid mass movement of soil and rock down a slope
volcano a structure that forms in Earth’s crust when molten material reaches Earth’s surface
meteor meteoroid that enters Earth’s atmosphere in a streak of light
crater a large, bowl-shaped cavity in the ground caused by meteor impact
Created by: wtrscience6
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