Exam1_S08_A_KEY[1] - Geology 101 001 Spring 2008 Name(print...

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1 Geology 101 001 Name (print)___________________________________ Spring 2008 TEST #1 (each question worth 1 pt; 80 pts total) Version: A I. Multiple Choice. Read each question carefully and pick the BEST answer. Clearly mark your SCANTRON to indicate your choice. 1. The majority of the igneous rocks that we see on Earth originate from the _______. 1) outer core and lower mantle 2) feldspar weathering 3) melt material associated with meteorite impacts 4) all of the above 5) none of the above 2. Atomic number _______. 1) is defined as protons plus neutrons 2) ranks the elements in terms of their abundance in the Earth’s crust 3) is reported in the Periodic Table as the average of all isotopes for the Earth’s suface 4) all of the above 5) none of the above 3. Potential consequences of global warming and climate change include _______. 1) changes in rainfall and drought patterns 2) melting of glaciers and polar ice caps 3) flooding of coastal communities 4) disruption of ecosystems 5) all of the above 4. Which is NOT used as evidence of internal order within minerals? 1) well-formed crystal faces 2) definable composition 3) constancy of interfacial angles 4) x-ray diffraction patterns 5) cleavage in one or more directions 5. The average density for oceanic plates is 3.0 g/cm 3 . Given what you know about the role of density at subduction zones, what is the average density of the continental crust? 1) 3.7 g/cm 3 2) 3.5 g/cm 3 3) 3.0 g/cm 3 4) 2.7 g/cm 3 6. Which of the following best explains why graphite is soft compared to diamond? 1) graphite is made of lead (Pb) and diamond is made of carbon (C) 2) graphite contains no covalent bonds 3) weak van der Waals forces link sheets of graphite 4) all of the above 5) none of the above
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