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Plate Tectonics

QuestionAnswer
Convergent Collision. Continental - Continental When two Continental plates collide. Forms folded mountains
Convergent Subduction. Ocean-Ocean When an ocean plate sinks below another plate as they converge, due to having a higher density. Forms an ocean trench and volcanic island
Divergent- Ocean-Ocean When to plates move in opposite directions of each other, divide. Forms a mid-ocean ridge and new crust!
Transform When 2 plates slide past each other. Any crust combination! Forms a fault line
Convergent Subduction. Ocean-Continent When an ocean plate sinks below another plate as they converge, due to having a higher density. Forms an ocean trench and volcanic mountains
Subduction When one plate sinks below another plate due to being more dense.
continental Crust Usually thicker, less dense crust
Oceanic Crust Less thick, more dense
Divergent Continent-Continent When 2 continental plates divide, creates a Rift Valley. NO NEW CRUST
Astenosphere A layer of Earth just below the lithosphere, this is where convection occurs which moves to plates. This is the upper part of the mantle.
Lithosphere The outer rocky layer of earth containing the plates/crust
Plate Tectonics The theory of HOW Earth's plates move
Continental Drift A theory proposed by Alfred Wegner that says Earth's continents used to be one super continent, but slowly drifted apart over time. Was not accepted initially due to not being able to explain HOW the plates move.
5 Evidences of continental drift -Continental puzzle pieces -Plant/animal fossils -Glacial Striations -Rock evidence -Ancient climates- Tropical species found fossilized in Antarctica further explanation of this found in continental drift slides in canvas
Sea Floor Spread Theory that states an O-O divergent boundary causes the two crusts to "spread" away from the ocean ridge. Newer crust found at ridge, older crust on opposite side where it eventually subducts.
Created by: user-1542598
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