Plate Tectonics Definitions

1. A process by which water-saturated sediment temporarily loses strength and acts like a fluid. (12)
4. The largest and deepest mass of igneous rock forced into the crust. (9)
5. A narrow zone defined by earthquake foci and tens of kilometres thick dipping from the surface under the Earth's crust. (7, 4)
7. A horizontal structure of igneous rock continuous with layers of rocks, where magma is forced along bedding planes. (4)
8. Scientist who thought that the continents where once one super continent. (7)

2. Layer below the lithosphere mainly in the mantle where seismic waves decrease with depth probably as a result of high temperature causing rock deformation. (13)
3. Surface seismic waves which cause the ground to move sideways. (4, 4)
5. Rapidly cooled larger blocks of molten lava. (4)
6. Seismic caused sea waves 95% caused by earthquakes and few by volcanoes under the sea. (7)
10. The molten layer of rock beneath the crust. (6)

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