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Unit 3 Vocab Leah Mo
Plate Tectonics
| Term | Definition |
|---|---|
| Asthenosphere | The Asthenosphere is just the upper layer of the earth’s mantle |
| Subduction | Subduction is as a process in which one tectonic plate slips underneath another tectonic plate |
| Seafloor Spreading | Seafloor spreading is a hypothesis in which new crust is being formed at the mid-ocean ridges and is destroyed at the deep sea of the trenches. |
| Mantle Convection | The mantle convection is circular currents that occur within the mantle in a cycle driven by heat |
| Ridge push | Ridge push is where the magma breaks through earth's crust and hardens creating mid-ocean ridges and pushing the crust away |
| Slab Pull | Slab pull is older, colder, denser plates that sink at the subduction zones |
| Lava | Lava magma that flows out onto the earths surface |
| Magma | Magma is just the hot fluid inside of the volcano |
| Tectonic Plate | massive, irregular shaped slab of solid rock |
| Theory of Continental Drift | Theory that all continents were once a super continent called Pangaea |
| Convergent Boundary | They move towards each other |
| Divergent Boundary | They move away from each other |
| Transform Boundary | They slide pass each other |
| Hot Spot | The hot spot is unusually the hot area on earth's mantle where high temp plumes of mantle material rise toward the surface |
| Epicenter | The epicenter is the point on earth's surface directly above the focus of an earthquake |
| Focus | The focus is the point of the initial fault rupture where the earthquake originates |
| Pangaea | The Pangaea is the landmass made up of all the continents that began to break apart |
| Geo-hazard | The Geo-hazard is a widespread that leads to damage or risk |
| Reverse-Fault | Reverse Fault is two blocks of rocks being forced together by compression |
| Strike-Slip Fault | Strike-Slip Fault is vertical fractures where the two blocks are being moved horizontally |
| Normal Fault | Normal Fault is when the hanging wall gets moved downward |
| Compression | Compression is something getting made smaller or pressed down together |
| Tension | Tension is pulling a force |
| Shearing | Shearing is a force, or movement being applied to an object |
| Felsic | Felsic is a type of igneous rock |
| Mafic | Mafic is another type of igneous rock |
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leah12456
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