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scince vocab 1
lesson 12 13 +14
| Question | Answer |
|---|---|
| seismology | A scientist who studies earthquakes |
| seismograph | an instrument that detects, records and mesures the vibration produced by an earthquake |
| aftershock | an earthquake wave that follows the main shock of an earthquake |
| epicenter | the on the surface of the earth directly about the focus of an earthquake |
| plate tectonic theory | a theory that the lithosphere is broken into segments, or plates, that "float" on the asthenoshere and that interacts among these plates are associated with earthquakes and volcanic activity and form mid-ocean rigdes, treanches, moutains, etc. |
| mid-ocean ridge | a moutainlike landform that develops when plates separate and new ocean lithosphere |
| crust | the earth's outer layer, the coolest and least dense layer of the earth |
| continental crust | it contains mostly land. it ranges from 5 to 10 km thick and it is thickest under moutains |
| mantle | the layer of the earth beneath th crust. it is about 2900 km thick and it makes up 83% if the earth's interior |
| outer core | liquid; made of iron |
| inner core | solid; made out of iron and nickle |
| asthenosphere | the layer of the matle that lies directly below the lithoshere and flows like taffy |
| lithoshere | the cool solid outer shell of the earth. it consits of the crust and the rigid uppermost part of the matle and is broken up into segments, or plates. |