We know the age of the lunar highlands from ________
A) age estimates from cratering rates
B) dating of lunar rocks collected by Apollo missions
C) dating of lunar maria basalts collected by Apollo astronauts, and extrapolated back in time by relative chronology
D) dating of earth rocks, and correlating to lunar events
C
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The major storage in the phosphorus cycle is in ________
A) the atmosphere B) the hydrosphere C) the lithosphere D) rivers and freshwater lakes E) our homes and offices
The annual freezing and thawing of ice is a major factor on the regulation of temperatures on Earth. Indicate whether the statement is true or false
What is the pattern of the three-stage sequence by which firms have grown in the U.S.?
A) vertical integration (1890s-1919), then horizontal integration (1920s-1940s), followed by diversification (since 1950s). B) diversification (1890s-1919), then horizontal integration (1920s-1940s), followed by vertical integration (since 1950s). C) diversification (1890s-1919), then vertical integration (1920s-1940s), followed by horizontal integration (since 1950s). D) horizontal integration (1890s-1919), then vertical integration (1920s-1940s), followed by diversification (since 1950s). E) vertical integration (1890s-1919), then diversification (1920s-1940s), followed by horizontal integration (since 1950s).
Vertical movement and horizontal movement caused by the expansion of freezing water are called
A) frost heaving. B) frost thrusting. C) solifluction and gelifluction, respectively. D) frost thrusting and frost heaving, respectively. E) frost heaving and frost thrusting, respectively.