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Plate techtonics
| Question | Answer |
|---|---|
| the outer most layer | crust |
| The middle layer | mantle |
| the liquid layer that is responsible for earths magnetic field | outer core |
| hottest layer | inner core |
| Who came up with the theory of continental drift | Alfred Wegner |
| Heat within the earth: 3 examples | Moving objects, gravity, radioactive decay |
| Evidence of Continental drift | Puzzle like fit, fossils, similar rock structures, glaciers |
| Earths crust is made of large plates that move around the top of the asthenosphere | Plate tectonics |
| older rocks move farther and farther, pillow lava, magnetic reversal | sea floor spreading |
| The theory that all of the of earths continents were once joined together | Pangaea |
| The process by which the ocean floor sinks into the mantle | Subduction |
| A device that scientists use to map the ocean floor | sonar |
| A chain of underwater mountains along which sea-floor spreading occurs | mid ocean ridge |
| What happens when the sea floor spreads apart | hot magma moves upward |
| The scientist who created echo-sounding devices for mapping the ocean floor | Harry Hess |
| How were the himalayan mountains formed | Continents colliding with each other |
| what happens at divergent boundaries | plates move apart |
| what happens at convergent boundaries | plates move together |
| what happens at transform boundaries | the plates grind together |
| what happens when the plates grind together | they shear |
| What happens to the old rock in a mid ocean ridge | It is pushed away |
| where in America is the a strike and slip fault | California |
| Convergent boundaries have what kind of faults | reverse |
| Divergent boundaries have what kind of faults | convergent |
| Transform boundaries have what kind of faults | strike and slip |
| What layer are convection currents found in | asthenosphere |
| What type of natural disaster happens at a transform boundary | earthquakes |
| what is the process for the movement of tectonic plates | convection |
| landforms that are created from convergent boundaries | mountain, deep ocean trench, volcanic arch, island arch, trenches, |
| Landforms that are created from divergent boundaries | mid ocean ridges and rift valleys |
| Landforms that are created from transform boundaries | faults and earthquakes |
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