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Plate Tectonics

Natalya Garcia

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Across
1.A fracture in rock where there has been movement
2.one of the three main layers of the Earth
5.An instrument that measures and records details of earthquakes
8.liquid rock found under the surface of the Earth
15.The outer part of the earth, consisting of the crust and upper mantle
16.a layer rich in iron and nickel found in the interior of the Earth
18./the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle
19.super continent
20.the movement of the Earth's continents relative to each other by appearing to drift across the ocean bed
Down
3.the process of withering away
4.Molten magma released from a volcanic vent or fissure.
6.when two oceanic plates pull apart, magma rises and new crust is formed
7.rock formed by the solidification of molten magma
9.move on a plastic like layer of the mantle
10.a scientist who studies the forces that make and shape planet earth
11.a series of vibrations induced in the earth's crust
12.A tectonic boundary where two plates are moving away from each other
13.A geologic process in which one edge of one crustal plate is forced below the edge of another
14.a mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
17.Oceanic crust is made of

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