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Plate Tectonics
Science
| Question | Answer |
|---|---|
| convergent boundary | where two plates come together |
| outer core | 2,266 km thick mostly made up of metals iron and nickle consist of two parts outer and inner |
| plate tectonics | explains theory formation movement and subduction of Earth's plate |
| subduction | Process in which crust sinks back into the mantle through deep oceans |
| Pangaea | Greek for all lands, German scientist said contenents drifted together |
| divergent boundary | where two plates move apart |
| transform boundary | where two plates slide past each other causing earthquakes |
| seismic waves | waves cause by earthquakes |
| basalt | dark rock found on ocean crust |
| granite | rock found on continental crust |
| mantle | hot solid rock over 3000 kms |
| lithosphere | upper more part of the mantle |
| asthenosphere | below the lithosphere |
| lower mantle | beneath the asthenosphere and is soilid |
| convection current | a cycle of heated molcules floating to the surface and then sinking when it cools |
| convection currents in earth | heat from the core and mantle |
| conduction | the way heat travels in matertials by tounching each other |
| radiation | heat transfers through heat waves |
| deep ocean trench | a valley along the ocean floor which crust sinks in to the mantle (subduction) |
| fossil | ancient organism that has been preserved by rock |
| continental drift | Wegener hypothesis that all continents were together |
| sonar | a device that determines the distance of an object under water be recording echoes of sounds waves |
| rift valley | a deep trech caused by divergent boundary |
| crust | layer of rocks that forms the Earth's surface |
| layers of the Earth | crust, mantle, lithosphere Asthenosphere, lower mantle, outer core inner core |
| inner core | most dense part many people would think there would be hot lava there but it is actually it is solid iron and nickel |
Created by:
Kevin*1
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