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plate tectonics-max
geology 12 plate tectonics
| Question | Answer |
|---|---|
| pangaea | super continent that existed 200 million years ago |
| Atlantic Ocean | ocean created when Pangaea broke apart |
| Alfred Wegener | scientist who thought that the continents were once one super continent |
| sea-floor spreading | theory that new ocean crust is formed at the mid ocean ridges by molten lava |
| lithosphere | crust and upper mantle |
| mantle | largest layer in the earth |
| crust | outermost layer of the earth |
| inner core | composed of dense iron and nickel |
| outer core | liquid core composed of iron and nickel |
| athenosphere | plastic layer before lithosphere |
| plates | large sections of earths crust, upper mantle and lithosphere |
| plate tectonics | theory that earths plates are broken into sections |
| continental drift | theory that continents move |
| divergent boundary | boundary between two plates that are moving apart |
| convergent boundary | boundary where two plates are moving towards each other |
| transform fault boundary | boundary where two plates are moving past each other |
| convection current | cycle of heating, rising, cooling and sinking |
| subduction zone | area where denser a converging plate descends or sinks under a less dense converging plate |