UST 289 Final Exam (A+ GRADED)

Geomorphology correct answers study of the shape of the Earth's features and how they change over time Present era of timescale correct answers Cenozoic era Radiometric dating correct answers rate of radioactive decay of rock elements to determine the age of rocks Timescale for geologic change correct answers history of the Earth since its formation as spanning a single 24 hour day, long time frame, relatively short period of evolving life forms Endogenic correct answers internal processes such as volcanic and tectonic activity Exogenic correct answers weathering by wind and water, and work at Earth's surface removing and transporting matter through running water, waves, glacial ice, and wind Core correct answers spherical central mass of the Earth composed largely of iron; consists of an outer liquid zone and an inner solid zone (highest temperature) 3000 C to 5000 C 3500 km Mantle correct answers rock layer of the Earth beneath the crust and surrounding the core, composed of ultramafic igneous rock of silicate minerals 2800 C to 1800 C 2900 km Asthenosphere correct answers softer, most fluid layer of mantle Crust correct answers outermost solid layer of the Earth, composed largely of silicate minerals 8 to 40 km thick Lithosphere correct answers outer shell of rigid, brittle rock, including the crust and also the cooler, upper part of the mantle Mineral correct answers naturally occurring inorganic crystalline chemical compound Elements in crust correct answers oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium Igneous rocks correct answers rock formed from the cooling of magma Magma correct answers rock in a mobile, high temperature molten state (felsic or mafic)