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Tectonics
Question | Answer |
---|---|
Pangea | Pangea means all land |
continental drift | Wegener's hypothesis that all continents had once been joined together |
sonar | System that uses sound waves to calculate the distance to an object |
paleomagnetism | As certain rocks form, they acquire the polarity that Earth's magnetic field has at a time. |
subduction | Ocean floor returns to mantle |
sea-floor spreading | Process by which plate tectonics produces new oceanic lithosphere at ocean ridges |
mid-ocean ridge | A long chain of mountains extending the length of the ocean |
rift valley | a deep central valley of a mid ocean ridge |
deep-ocean trench | form the deepest of Earth's oceans. |
plate | Broken up pieces of the Lithosphere |
volcanic island arc | This newly formed land consiting of an arc-shaped chain of small volcanic islands |
continental volcanic arc | an arc of continents with volcanos |
transform fault boundary | a boundary in which two plates slide past each other without creating or destroying lithosphere |
divergent boundary | Found where two of Earth's plates move apart. |
convergent boundary | Where to plates come togeather |
plate tetonics | plates move slowly relative to each other, driven by convection currents in the mantle. |
convection current | convective flow in the mantle causes tectonic plates to move |
ridge-push | Lithosphere slides down the Athenosphere |
mantle plume | A raising column of hot solid mantle rock |
slab-pull | Pulls the old ocean lithosphere into the mantle. |