Exam_1b

Exam_1b - Name: Geology 101 Exam 1 1. Most commonly, felsic...

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1. Most commonly, felsic igneous rocks ____________. a. contain more iron and magnesium than intermediate rocks b. are lighter in color than mafic rocks c. are darker in color than mafic rocks d. are found in oceanic crust 2. About how long after the Big Bang did the first elements form? a. 3 seconds b. 10 years c. 300,000 years d. 3 billion years 3. You are standing on top of a volcano located at a convergent plate boundary on continental crust. Which two minerals are most likely to be in the rocks below your feet? a. quartz, muscovite b. olivine, Ca-rich plagioclase c. amphibole, biotite d. olivine, quartz 4. The mineral orthoclase has the following formula - K(AlSi 3 )O 8 . What kind of silicate structure does orthoclase have? a. framework b. single chain c. sheet d. double chain 5. Which of the following statements is true? a. a scientiFc theory is consistent with many observations and has passed many tests. b. scientiFc theories can be quite speculative and may fail to explain many observations related to the theory. c. there is no real difference between a scientiFc theory and a scientiFc hypothesis. d. scientiFc theories can be proven true after years of testing. 6. As the solar nebula cooled the planets began to condense out of the swirling disk of material that surrounded the Sun. Which of the following statements is true? a. Elements and compounds which melt and vaporize at low temperatures tended to remain nearest the Sun, which was very hot. b. Elements and compounds which melt at high temperatures and are usually solid tended to remain in the cold, outer parts of the solar nebula c. The compounds that make up the terrestrial planets have higher melting temperatures than the compounds that make up the giant planets. d. Compounds such as iron and magnesium oxide are common in the planets Neptune and Pluto. Name: Geology 101 Exam 1
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7. The mineral augite has the chemical formula Ca(Mg,Fe)(Al,Si) 2 O 6 . This mineral has which kind of silicate structure? a. single chain
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This document was uploaded on 10/28/2011 for the course GEOL 101 at UNC.

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Exam_1b - Name: Geology 101 Exam 1 1. Most commonly, felsic...

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