Plate tectonics (unit 3 vocab)
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| Asthenosphere | Highest layer on the earths mantle, but still lower than the lithosphere
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| Subduction | Process where two tectonics plates collide
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| Seafloor spreading | Theory that the oceanic crust was created at the ocean ridges
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| Mantle convection | Convection currents in the mantle that are thought to be the main cause of plate movements
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| Ridge push | process connected to convection currents in the earths mantle , occurs when the weight of a elevated ridge pushes an oceanic plate towards a subsection
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| Slab pull | Tectonic process involved with convection currents, occurs when the weight of a subduction plate pulls the lithosphere into a subduction zone
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| Lava | Magma flowing onto the earths surface
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| Magma | molten rock below the earths surface
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| Tectonic plates | pieces of the crust that covers the earths surface
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| Theory of continental drift | Wegeners theory that earths continent were once one big super continent called Pangea
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| Convergent boundary | place where two tectonic plates will move toward each other
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| Divergent boundary | where two of earths tectonic plates will moving apart
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| Transform boundary | Place where two tectonic plates end up sliding horizontally away from each other
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| Hot spot | A hot area in the earths mantle
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| Epicenter(in regards to earthquakes) | Point on Earths surface directly above the focus of an earthquake
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| Focus(in regards to earthquakes) | point of the initial fault rupture where an earthquake originates
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| Pangaea | A landmass made up of all the continents that had supposedly began to break up around 200million years ago
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| Geo hazard | Geological dangers that may cause changes to the Earth's surface
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| Reverse fault | Formed by vertical and horizontal compression, it causes a vertical movement upwards along a fault plane
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| Strike-slip fault | Caused by horizontal shear that causes horizontal movement along a fault plane
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| Normal fault | Its tension causes vertical movement downwards along a fault plane
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| Compression | Stress that decreases the volume of a material
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| Tension | Stress that pulls a material apart
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| Shearing | Stress that causes a material to twist
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| Felsic | Light colored igneous rock
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| Mafic | Dark Colored igneous rock that are made of more lighter elements that are more buoyant
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