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TheoryPlateTectonics

8th Earth Science

QuestionAnswer
The hypothesis that today's continents were once part of a single landmass. continental drift
The scientist that proposed the idea of continental drift. Alfred Wegener
The name for the supercontinent where all the continents on Earth were one big landmass. Pangaea
The theory that states Earth's lithosphere is made up of giant, moving slabs (pieces). Theory of Plate Tectonics
A system of ideas that explains many related observations about the natural world. theory
Underwater mountain chains are called _________? mid-ocean ridges
The process by which new sea-floor forms is called ___________? sea-floor spreading
The process by which one tectonic plate is pulled beneath another tectonic plate. subduction
A change of the magnetic poles on Earth is called ________? magnetic reversal
The edge of where two tectonic plates meet. tectonic plate boundary
The process that causes melted rock in the mantle to move in circular motion and move the tectonic plates. convection currents
The process by which oceanic crust that forms at a mid-ocean ridge becomes thicker as it moves farther down the ridge. ridge push
The process of the subduction of cold, dense oceanic crust that is created from a mid-ocean ridge. The oceanic crusts gets colder and denser and sinks further into the mantle. slab pull
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