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Plate Tectonics

Demetrius Brooks

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Across
4.True or false the asthenosphere is in the upper mantle and the lower crust?
6.What was the name of the super continent?
7.What is the name of the first layer of the earth?
10.He believed that earth was once a super continent.
13.A soft layer of the upper mantle?
15.Are tectonic plates part of the lithosphere or asthenosphere?
16.True or false divergent boundaries create mid-ocean ridges?
17.What is the third layer of the earth?
18.What is the fourth layer of the earth?
19.When two tectonic plates move apart it is a ______?
Down
1.Is the asthenosphere soft or hard?
2.What is the second layer of the earth?
3.When two tectonic plates collide with one another it is a _________?
5.Found out that magma rose up through the ocean floor.
8.belt around the Pacific Ocean where oceanic and continental plates collide.
9.When two tectonic plates slide past each other horizontally it is a _______?
11.When two continental plates get stuck and the suddenly become unstuck it makes a ________?
12.Proof of Pangaea was that they found _______ in two different continents?
14.How many types of boundaries are there?
20.True or false divergent boundaries also create rift valleys?

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