ERTH 2415 Quiz: ERTH Important words
29 Oct 2015
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Document Summary
Space objects: meteoroid: space debris orbiting the sun. Great canadian impact tour: astrobleme: star wound or impact crater. Has striations and an apex: gravimeter: used to make gravity measurements and map heterogeneities in the subsurface. Plate tectonics: differentiation: gravity causes denser material to migrate to the center of a planet, crust: silicon and oxygen, continental and oceanic, mantle: magnesium and iron, core: iron metallic. Lithosphere: rigid; the land we walk on ex. Rocks: asthenosphere: plastic; mold-able material, convection: heat transfer by fluid circulation, drives the tectonic plates to move, tectonic: part of the deformation forces acting on the earth"s lithosphere. Two plates are being pulled away from each other: convergent zone: dominant force is compression. Tectonic plates moving against each other: hot spot: dominant forces are tension and compression. Plate tectonics and earthquakes: rift: valley created at a pull-apart zone, crustal earthquakes: in the overriding plate.
