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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. |
Created by:
Mrs.Stichter
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