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Plate tectonics with vocabulary

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Page 1: Plate tectonics with vocabulary

VOCABULARY

Page 2: Plate tectonics with vocabulary

plate tectonics-

theory that continents are in slow, constant motion.

Page 3: Plate tectonics with vocabulary

continents-

huge land masses

Page 4: Plate tectonics with vocabulary

Continental Drift-

the theory that the continents were once a single land mass and have broken apart and “floated” to where they are today

Page 5: Plate tectonics with vocabulary

Alfred Wegener-

German geologist who first came up with the Continental Drift theory in 1915

Page 6: Plate tectonics with vocabulary

Pangaea-

name that Wegener gave to the land mass known as the Supercontinent

Page 7: Plate tectonics with vocabulary

Mid-ocean ridge-

the longest mountain chain in the world

Page 8: Plate tectonics with vocabulary

Sea-floor spreading-

At the mid-ocean ridge, molten material rises from the mantle, then spreads out, pushing older rock to both sides of the ridge. This process, called sea-floor spreading, forms the new ocean floor.

Page 9: Plate tectonics with vocabulary

magma-

molten mixture of rock-forming substances, gases, and water that make up the earth’s mantle

Page 10: Plate tectonics with vocabulary

lava-

magma that has reached the surface; also the rock that’s formed when the liquid lava hardens

Page 11: Plate tectonics with vocabulary

volcano

a weak spot in the crust where magma has come to the surface

Video http://www.cbsnews.com/video/watch/?id=7389841n&tag=mncol;lst;10

Page 12: Plate tectonics with vocabulary

fault-

a break in rock where the rocks slide past each other; a break in the earth’s crust; earthquakes occur along faults

Page 13: Plate tectonics with vocabulary

earthquake-

the shaking that results from the movement of rock beneath the earth’s surface

http://video.nationalgeographic.com/video/player/environment/environment-natural-disasters/earthquakes/earthquake-101.html

Page 14: Plate tectonics with vocabulary

uplift-

the raising of the earth’s crust; usually results in mountain formation

Page 15: Plate tectonics with vocabulary

intrusion-

molten rock that has squeezed into existing rock and hardened

Intrusion of mafic rock into granite

Page 16: Plate tectonics with vocabulary

subduction-

process by which the ocean floor sinks back into the mantle

http://oregonstate.edu/media/trcnb-hiq

Page 17: Plate tectonics with vocabulary

rift valley-

a deep valley that forms where two plates move apart