5. A lithospheric plate can be composed of which of the following: a. Oceanic crust b. continental crust c. upper mantel d. all the above 6. In the quest for scientific exploration, Alfred Wegener attempted to explain geologic evidence he found in the Hypothesis of Continental Drift. The scientific community rejected Alfred Wegeners hypothesis because he failed to explain the _________________. a. the mechanism for moving continents b. the fit of the continents c. the distribution of fossilized organisms d. the distribution of glacial deposits 7. Crystal form is a physical property of minerals used in their identification. Which phrase best describes the concept of crystal form? a. The way in which a mineral breaks b. The external expression of a minerals internal structure c. The color of the powdered mineral d. The appearance of reflected light from a minerals surface 9 Many minerals belong to the large class of minerals called silicates. Pyroxene group minerals are one such group that happens to belong to what subclass of silicates? a) Isolated tetrahedra silicates b) Single chain silicates c) Double chain silicates d) Framework silicates 10)The Feldspar group of minerals (plagioclase and orthoclase feldspar) belongs to what subclass of silicate minerals? a) Isolated tetrahedra silicates b) Single chain silicate c) Double chain silicate d) Framework silicate
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