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plate tec. keyterms

plate tectonic keyterm

QuestionAnswer
the hypothesis that the continents slowly move across Earth’s surface continental drift
the name of the single landmass that broke apart 200 million years ago and gave rise to today’s continents Pangaea
the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary subduction
a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust plate
the theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle plate tectonics
a break in the Earth’s crust where masses of rock slip past each other fault
a plate boundary where two plates move away from each other divergent boundary
a plate boundary where two plates move toward each other convergent boundary
a plate boundary where two plates move past each other in opposite directions with no up or down motion transform boundary
a trace of an ancient organism that has been preserved in rock or other substance fossil
The instrument used to measure the strength of an earthquake Seismograph
The point underground, where rock breaks and an earthquake is created focus
The point on the Earth's surface, directly above an earthquake epicenter
what landform is created when two continental plates converge Mountains
The plate boundary around the Pacific Ocean, where most of the world's volcanoes are located. Ring of Fire
Who developed the theory of Continental Drift? Alfred Wegener
Why did most of the world not origninally accept the theory of continental drift? There was no explanation for the force that moved the continents; why it happened
Name one piece of evidence that supports Sea Floor Spreading. Eruptions of molten material, Drilling samples (ages of rocks), magnetic stripes
What type of plate boundary is most likely to have a volcano? Convergent (subduction)
Name one piece of evidence that supports the theory of continental drift? Evidence of climate change, matching fossils on different continents, matching landforms/minerals on different continents, shape of continents
Why does subduction occur? Because Oceanic crust is much more dense that continental crust
Where does a rift valley form? A divergent boundary between continental crust
What causes the movement of Earth's Plates? Convection currents in the mantle
Created by: 6thGradeScience
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