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NCTS Plate Tectonics

Plate Tectonics Review

QuestionAnswer
Explains how and why Earth movements take place Theory of Plate Tectonics
Who proposed the theory of continental drift? Alfred Wegener
When magma squeezes out between two different plates Seafloor Spreading
Remains or traces of an organism Fossils
Plates move only a few _______ each year. Centimeters
The type of crust under the Pacific Plate. Seafloor
A boundary where plates are moving toward each other. Convergent
A boundary where plates are moving away from each other Divergent
A boundary where plates are sliding past each other. Transform
North America, Europe, and Asia make up this continent after Pangea broke apart. Laurasia
South America, Africa, India, Australia, and Antarctica make up this continent after Pangea broke apart. Gondwanaland
Why does the seafloor always move under the continental plate? The seafloor always moves under the continental plate because it is more dense.
What is the Earth's core made of? Solid, dense, iron.
In what layer of Earth do convection currents take place? Asthenosphere (mantle)
When seafloor and continental plates collide, what do they create? Volcanoes
When two continental plates collide, what do they create? Mountains
What are the two types of crust? Seafloor and continental.
Name two pieces of fossil evidence. Answers may include: Glossopteris and/or Mesosaurus. (Need to be able to "tell the story".)
Name a piece of geology evidence and explain how it supports the idea that the plates are moving. Answers will vary and may include: Fit of continents, seafloor spreading, magnetism, volcanoes & earthquakes, and similar rock types.
What is the difference between lasers and GPS and how they track land movement? Lasers are sent to satellites and scientists measure the differences in time it takes for the signal to return. GPS sends signals to satellites and scientists measuring the differences in distances.
Created by: dsteffey
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