If a chemist wishes to carry out a reaction in which one reactant is a solid and one is a liquid, which of the following will be most effective in speeding up the reaction?
A) adding more liquid reactant
B) grinding the solid to a form a powder
C) placing a larger crystal of the solid in the same volume of liquid reactant
D) None of the above will have a significant effect on the rate of reaction,
B
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Which of the following cloud types most likely forms in an unstable atmosphere?
A. stratus B. cirrostratus C. cumulonimbus D. nimbostratus
What is the difference between a joint and a fault?
A) A joint is formed by confining pressure. B) A joint is formed by differential stress but a fault is not. C) A fault is formed by tension, but a joint is formed by compression. D) A fault displaces the rocks on one side relative to another.
Which statement characterizes Northern Hemisphere tropical cyclones?
a. They turn clockwise. b. They form in areas of high pressure. c. Moist surface winds spiral in toward the center of the storm and rising winds exit from the storm at high altitudes. d. The greatest destruction from wind and storm surge will occur to the west of its center. e. They form over cool ocean temperatures
The effect of ____ has led to the decline of calcium-forming phytoplankton as well as coral reef polyps
A) ?pollution B) ?a warming ocean C) ?increased sedimentation rates D) ?ocean acidification