S17+GEOL113+Study+Guide+Exam+2

S17+GEOL113+Study+Guide+Exam+2 - GEOLOGY 113 EARTH SCIENCE...

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° GEOLOGY 113 - EARTH SCIENCE - STUDY GUIDE Exam 2 The exam is worth 80 points and will have about 40 questions. It covers the material from 7 lecture periods and 4 chapters, so you can expect roughly 6 questions per period. Deserts and Glaciers (CH 6) How much of Earth’s land surface is covered by deserts today? What are the 3 criteria for calling a region a desert? (listed on powerpoint) Where do you find subtropical deserts? Which causes more erosion in deserts – water in the form of infrequent flash floods or continual blowing wind? Glaciers form when what 3 conditions are met? (listed on powerpoint) Can glaciers form at the equator? (under what conditions?) Can glaciers form at sea level? Remember that glaciers can flow and that they flow downhill and outward due to gravity. What is a moraine? Can you think of an example? Plate Tectonics (CH 7) *** What is a fact? What is evidence? What are hypotheses? What is a theory? (CH 1.2) Layers of Earth by composition: Core, mantle, crust. What is each layer composed of? Layers of Earth by strength: What is the lithosphere? A plate? The asthenosphere? (Know the difference between lithosphere, asthenosphere, crust, and mantle) Plate Tectonic Theory . Know that plate tectonics is a working model (theory) that is based on three fundamental principles: 1) the outer shell of Earth is divided into a series of 12 or so individual lithospheric plates 2) these plates are in motion horizontally with respect to one another and with respect to the underlying lower mantle. 3) plates are internally rigid and the interaction of two plates at a plate boundary is responsible for most earthquakes, volcanoes, mountain ranges, and other tectonic features and geologic hazards.
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