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Plate Tectonics
Question | Answer |
---|---|
Alfred Wegener | The German scientists who in 1912 developed the theory of continental drift later to be known as plate tectonics. |
Transform Boundary | A plate boundary where two plates slide horizontally past each other. |
Divergent Boundary | A plate boundary where two plates move aways from each other. |
Plate Tectonics | The theory that pieces of the Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. |
Sea-Floor Spreading | The process by which molten material adds new oceanic crust to the ocean floor. |
Mid-Ocean Ridge | The undersea mountain chain where new ocean floor is produced by a divergent boundary. |
Continental Drift | The hypothesis that the continents slowly move across the Earth’s surface developed by Alfred Wegener. |
Convection | The transfer of heat by movements of a heated fluid. |
Convection Current | The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another. This happens in the mantle. |
Deep Ocean Trench | Deep valleys along the ocean floor through which oceanic crust slowly sinks towards the mantle. |
Fault | A break in the Earth’s crust where slabs of rock slip past each other. |
Convergent Boundary | A plate boundary where two plates move towards each other. |
Pangea | Hypothetical land area believed to have once connected nearly all of the Earth's land masses together. |
Tsunami | A large ocean wave that is caused by sudden motion on the ocean floor. This sudden motion could be an earthquake, a powerful volcanic eruption, or an underwater landslide. |