Biological processes have removed most of the ________ from the Earth's atmosphere.
A. hydrogen
B. nitrogen
C. carbon dioxide
D. argon
E. oxygen
Answer: C
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Active stratovolcanoes (or composite volcanoes) are most commonly found
a) along rift valleys (divergent boundaries) b) on hot spots c) along subduction zones d) along continent-continent collision zones e) in all of the geologic settings described above
Erosion of the Precambrian igneous and metamorphic core of the uplifted Ancestral Rockies
produced thick fans of arkose and conglomerate. Indicate whether the statement is true or false.
Who developed the first clock accurate enough to determine longitude?
a. Benjamin Franklin b. John Harrison c. Matthew Maury d. James Cook e. Alfred Thayer Mahan
The slope of a cold front is much gentler than that occurring in a warm front
Indicate whether the statement is true or false