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Salyards Science - Plate Tectonics Vocabulary

Across
The process that occurs when a more dense plate moves underneath a less dense plate.
Place where two or more plates meet.
Theory that pieces of Earth's lithosphere are in constant motion driven by convection currents in the mantle.
Movement of fluid caused by differences in temperature, that transfers thermal energy from one part of the fluid to another.
The measurement of how much mass is contained in a given volume of a substance.
Down
Outermost layer of the Earth; two types - oceanic & continental
Layer of the earth consisting of the crust and upper mantle.
Liquid mantle where convection takes place.
Boundary where two plates slide past each other forming earthquakes and fault lines.
Boundary where two plates move away from each other forming a rift valley or mid-ocean ridge.
Boundary where two plates come together forming a mountain range or a more dense plate may subduct under a less dense plate forming a trench, volcanos or islands.