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Chapter 10

Plate Tectonic Vocab

QuestionAnswer
Define Alfred Wegener’s hypothesis of continental drift. hypothesis that the continents moved to their present locations
Describe sea-floor spreading. process by which new sea floor forms as magma rises through a rift
Why was the study of paleomagnetism in oceanic crust key in proving Wegener’s hypothesis? because it provided evidence of sea-floor spreading
Define plate tectonics. the theory that explains why and how continents move
What are frequent earthquakes in a given zone evidence of? tectonic plate boundaries
Describe a divergent boundary boundary at which two plates move away from each other
Describe a convergent boundary boundary that forms where two plates collide
Describe a transform boundary boundary where two plates slide past each other horizontally
What three things work together to produce constant tectonic plate motion? convection, ridge push, slab pull
What is one way tectonic plate movement affects climate? it creates mountains that affect wind patterns
How many major tectonic plates are on Earth 15
What is asthenosphere solid, plastic layer of mantle beneath the lithosphere
the two types of crust that make up tectonic plates oceanic crust and continental crust
what is a sudden movement along the boundary of a tectonic plate? earthquake
What occurs frequently at the Pacific Ring of Fire? earthquakes and volcanoes
a zone of active volcanoes that encircles the Pacific Ocean is known as Pacific Ring of Fire
Earth's mantle is heated by core energy and radioactivity
the movement of heated material due to differences in density is called convection
Created by: Amatulli Science
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