The common mineral ________ is an example of an isolated silica tetrahedron structure.
A. pyroxene
B. amphibole
C. olivine
D. feldspar
E. mica (biotite, muscovite, etc.)
Answer: C
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Which of the conditions below would most likely produce warming at the earth's surface?
a. increase the amount of low-level global cloudiness b. increase the amount of sulfur-rich particles in the stratosphere c. decrease the energy output of the sun d. increase the amount of global snow cover e. increase the amount of high-level global cloud cover
Where is most of the carbon stored in the oceans?
A. Precipitated out as limestone B. Dissolved in the water C. Trapped in the shells of sea animals
Judge the following sentence according to the criteria given below: The correlation between coral bleaching and water temperature doesn't concern marine scientists BECAUSE sea surface temperatures are becoming cooler as a result of global cooling
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Which of these, both of the same length, has the greater electrical resistance?
A. A thin copper wire. B. A thick copper wire. C. both about the same D. need more information