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Plate Tectonics Unit
Earth's Layers, Continental Drift, Plate Tectonics, Etc
| Answer | Question |
|---|---|
| Alfred Wegener | Meteoroligist that theorized the drifting of the continents |
| Theory of Continental Drift | All of the continents once created a large land mass called Pangaea and still continuously move 1-10 cm per year. |
| Asthenosphere | Hot, soft plastic-like layer of the Earth responsible for continental drift. |
| Lithosphere | Rigid rock layer broken into many plates. |
| Outer core | Hot, Molten Layer made of Iron and Nickel |
| Inner core | Solid layer of iron and nickel; responsible for Earth's magnetic fields. |
| Basalt | Type of rock found "beneath the salty water" |
| Granite | Continents are made of this type of rock. |
| Continental crust | Less dense crust that forms land masses. |
| Oceanic crust | This type of crust is dense and will subduct at a convergent boundary. |
| Transform boundary | Plates try to slide past each other in opposite directions. |
| Divergent boundary | Location where plates move away from each other on land or under water. |
| Convergent boundary | Plates collide to form mountains or subduct under one another. |
| Reverse Fault | Found at a convergent boundary and forms under a compressional stress. |
| Normal Fault | Plate above fault line drops down. |
| Strike-slip Fault | Plates move in opposites direction shearing past each other |
| Focus | origin of an earthquake inside the Earth. |
| Epicenter | Where an earthquake begins on the surface of the Earth. The most destruction is found here. |
| Primary Wave | Push-pull wave that moves through solids, liquids, and gases. |
| Secondary Wave | Wave that only moves through solids and moves like a "snake". |
| Surface Wave | Rolls like the ocean through the surface of the Earth. Is the most destructive seismic wave. |
| Seismologist | Studies earthquakes |
| Seismograph | Instrument used to record seismic activity. |
| Seismogram | Data collected that shows the size of seismic waves. |
| Tsunami | Giant sea wave created by underwater seismic activity. |
| Ring of Fire | Most of the volcanoes found throughout the world are located in the....... |
| Pacific Ocean | The Ring of Fire is found near this body of water. |
| Pyroclastic Flow | A explosive volcanic eruption |
| Magma | Molten material found beneath Earth's surface. |
| Lava | Molten material that has been released onto Earth's surface. |