You would expect only slight physical and chemical weathering under natural conditions of
(a) lower mean annual rainfall and temperatures.
(b) temperatures below freezing.
(c) higher temperatures and lower precipitation.
(d) extreme cold and high precipitation.
Ans: (c) higher temperatures and lower precipitation.
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Current flow direction can be determined by cross-beds and some ripple marks
a. True b. False
Using the choices below, select the statement that best explains how dissolved gases drive volcanic eruptions
A) As the magma rises, gas bubbles contract, fragmenting the material and expelling it from the vent. B) As the magma rises, gases reduce silicate mineral chains by breaking silicon-oxygen bonds; the result is an explosion. C) Confining pressure decreases on a rising magma, allowing gas bubbles to expand and fracture the magma. This process further decreases pressure on the magma and will result in an explosive event. D) Decreases in confining pressure result in decreasing viscosity of the magma, allowing the magma to ooze from the volcano.
The ionizing ability of radiation is measured by which of the following?
A) becquerel B) curie C) roentgen D) all of these
Which of the following is true in the United States?
a. Democrats are more likely to support this climate change pact than Republicans. b. Neither Democrats nor Republicans are likely to support this climate change pact. c. Both Democrats and Republicans are likely to support this climate change pact. d. Republicans are more likely to support this climate change pact than Democrats.