The very common mineral shown in this photograph is commonly a pink- to cream-colored mineral with wavy, light-colored lines. What mineral is it?

A. quartz
B. muscovite
C. garnet
D. biotite
E. feldspar


Answer: E

Environmental & Atmospheric Sciences

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During late afternoon/early evening in urban areas,

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Your car lights were left on while you were shopping, and now your car battery is dead. Has the pH of the battery fluid increased or decreased?

A. The pH of the battery fluid has increased. B. The pH of the battery fluid does not change. C. The pH of the battery fluid has decreased. D. Since the lights were left on and the battery is dead, the pH of the battery fluid must be zero.

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Which of the following statements is false?

a. Ozone in the lower stratosphere shields the earth from about 95% of the sun's harmful ultraviolet rays. b. CFCs are odorless and stable. c. CFCs are nonflammable, nontoxic, and noncorrosive. d. Fluorine atoms are most responsible for the breakdown of ozone to molecular oxygen. e. CFCs are cheap to produce.

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Some planktonic marine organisms produce a tiny droplet of oil to ________ density and ________ buoyancy

A) decrease; decrease B) decrease; increase C) increase; increase D) increases; decrease E) There is no relationship between density and buoyancy.

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