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Plate boundaries

Plate boundary terms and definitions

Divergent boundary A place where two plates move apart from each other
Rift valley Something that forms at a divergent boundary and is like a valley.
Wegener's theory Continental drift
Convergent boundary A place where two plates move towards each other
Plate tectonics A theory that explains how the plates form and move
Lithosphere Crust and upper mantle
Sea-floor spreading When magma pushes through the oceanic crust and pushes it away from a mid ocean ridge.
Super continent in Wegener's theory of continental drift Pangaea
Transform boundary When two plates slide past each other and create a fault
Plate boundary Where two plates meet
Crust Thinnest layer of Earth, made of mostly basalt and granite
Asthenosphere layer between crust and mantle, made of soft rock
Wegener's evidence Mountain formations, coal beds, glacier scratches, plants, animal fossils
Mid ocean ridge Something formed when a divergent boundary in the ocean continues and continues sea-floor spreading at the ridge
Core The center of the Earth
Created by: 15afu