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TheoryPlateTectonics
8th Earth Science
Question | Answer |
---|---|
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 |