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Unit 3 vocab Phillip
Plate tectonics
Term | Definition |
---|---|
Asthenosphere | the upper layer of the earth's mantle |
Subduction | movement of the edge of a plate of the earth's crust moving down |
Seafloor spreading | he formation of new areas of oceanic crust |
Mantle convection | liquid rising and sinking |
Ridge push | plate motion in plate tectonics that occurs at mid-ocean ridges |
Slab pull | tectonic plate being pulled down |
Lava | molten rock on the surface |
Magma | molten rock below the surface |
Tectonic plate | piece of the earth |
Theory of continental drift | all the continents were once connected |
Convergent boundary | plates moving toward to each other |
Divergent boundary | plates moving away from each other |
Transform boundary | plates slide past each other |
Hot spot | volcano regions |
Epicenter (in regards to earthquakes) | where most earthquakes occur |
Focus (in regards to earthquakes) | seismic waves originate |
Pangaea | super-continent |
Geohazard | A dis-tater caused by the earth itself |
Reverse fault | older rocks pushing |
Strike-slip fault | Tectonic processes associated with, zones of lateral displacement |
Normal fault | Hanging wall moving downward |
Compression | plates squeezing together |
Tension | being stretched |
Shearing | Being cut |
Felsic | igneous rich in elements |
Mafic | igneous rick with iron |