What process produces most caves?
A. the dissolving action of glaciers on rock, especially on marble
B. the dissolving action of streams on rock, especially on marble
C. the dissolving action of groundwater on rock, especially on marble
D. the dissolving action of groundwater on rock, especially on limestone
Answer: D
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Tar sands
a. are principal sources of conventional crude oil b. contain large supplies of heavy oils c. constitute a small but cheap supply of crude oil d. are usable only for aviation fuel e. are predominantly located in Canada
During a cold winter in which the Great Lakes are entirely covered by ice, lake-effect snows would be expected in extremely high frequencies and intensities
Indicate whether the statement is true or false
How do longshore currents cause sediment deposition or erosion along the shoreline?
What will be an ideal response?
Which of the following describes the sources for the production of carbohydrates during photosynthesis?
A) C - carbon dioxide, H - molecular hydrogen, energy - ATP B) C - carbon dioxide, H - molecular hydrogen, energy - sunlight C) C - glucose, H - water, energy - sunlight D) C - carbon dioxide, H - water, energy - sunlight