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Unit 3 Vocab-RobertC
Plate Tectonics
Term | Definition |
---|---|
Asthenosphere | A layer where it is a solid but it acts like a liquid |
Subduction | When one tectonic plate goes under another |
Seafloor spreading | Where new ocean crust comes and old ocean plates goes away |
Mantle convection | A cycle that moves tectonic plates by heating and cooling |
Ridge push | When lava hardens and pushes the plate away |
Slab pull | Its when older,cooler plates sinks at the subduction zone |
Lava | The hot liquid that is outside of a volcano |
Magma | The hot liquid that is underground |
Tectonic plate | A big chunk of rock that sits on the mantle |
Theory of continental drift | A theory created by Weneger that plate tectonics move |
Convergent boundary | When two plates are going to each other |
Divergent boundary | When two plates are going apart |
Transform boundary | When two plates are sliding against each other |
Hot spot | Its when high temperature plumes of magma rise to the surface |
Epicenter (in regards to earthquakes) | It is located above the focus |
Focus (in regards to earthquakes) | A point in the ground that makes the earthquake |
Pangaea | When all land was together |
Geohazard | A area that could lead to damage |
Reverse fault | Formed by having two plates forced together by compression |
Strike-slip fault | Where two blocks move horizontally |
Normal fault | Where the hanging wall goes down |
Compression | Where material is all compressed together |
Tension | When something is pulling and the more you pull something the more tension |
Shearing | When you are pulling something in one side and pull in the other side |
Felsic | Light color minerals in igneous rock |
Mafic | Dark color minerals in igneous rock |