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unit 3 vocab casey
plate tectonics
| Term | Definition |
|---|---|
| Asthenosphere | the upper layer of the earth's mantle |
| Subduction | the sideways and downward movement of the edge of a plate |
| Seafloor spreading | when devergent boundarys seperate |
| Mantle convection | is the very slow creeping motion of earth below |
| ridge push | sliding plate force is a proposed driving force for plate motion in plate tectonics that occurs at mid ocean ridges |
| Slab pull | Slab pull is the pulling force exerted by a cold, dense oceanic plate plunging into the mantle due to its own weight |
| Lava | lava is the liquid for of magma coming out of the volcano |
| maga | maga is the form of liquid that is inside the volcano |
| Tectonic plate | is a massive, irregularly shaped slab of solid rock |
| Theory of continental drift | Continental drift was a theory that explained how continents shift position on Earth's surface |
| Convergent boundary | is the boundary that combines |
| Divergent boundary | is the boundary that separates |
| Transform boundary | the boundary that sides to the side |
| hot spot | Hot spots are places within the mantle where rocks melt to generate magma. |
| Epicenter (in regards to earthquakes) | The epicenter is the point on the earth's surface vertically above the hypo-center |
| Focus (in regards to earthquakes) | The focus of an earthquake is the point where the rocks start to fracture |
| Pangaea | a place of were the continent were still together |
| Geohazard | A geohazard is a geological state that may lead to widespread damage or risk |
| Reverse fault | A reverse fault is one in which one side of the fault |
| Strike-slip fault | a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault. |
| Normal fault | A normal fault is a fault in which the hanging wall moves down relative to the footwall. |
| Compression | the action of compressing or being compressed. |
| Tension | the state of being stretched tight. |
| Shearing | Shearing forces are unaligned forces pushing one part of a body in one specific direction |
| Felsic | relating to or denoting a group of light-colored minerals including feldspar, feldspathoids, quartz, and muscovite. |
| Mafic | relating to, denoting, or containing a group of dark-colored, mainly ferromagnesian minerals such as pyroxene and olivine. |
Created by:
casey.r
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