Geochemical studies of rocks show that earth is approximately ________ years old
A) 500 million
B) 6 thousand
C) 30 billion
D) 4.56 billion
Answer: D
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What kind of information can marine microfossils not provide?
a. Temperature variations in the surface and deep water. b. Patterns in ocean circulation c. The orientation of the magnetic poles based on trace metals found within the shells d. Productivity of the marine biosphere and upwelling
The primary requirement for hurricane development is
A) warm land. B) water that is at least 27°C (81°F). C) the presence of the ITCZ. D) the presence of an easterly wave.
Atoms of which of the following elements are smallest?
A) Ca B) K C) Mg D) Na
A ________ is barren desert surface of exposed bedrock which also can be made of sedimentary material that has been evaporated by salts evaporated from groundwater
Fill in the blank(s) with the appropriate word(s).