________ is often paraphrased as "the present is the key to the past."
Answer: Uniformitarianism
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A gneiss containing kyanite and sillimanite most likely formed from a metamorphosed
A) limestone. B) mafic igneous rock. C) coal. D) shale.
After a plankton bloom, nonconservative nutrients are produced in high levels
Indicate whether the statement is true or false
PPP in GNI PPP accounts for:
A) petroleum exports B) how much a person's income can really buy C) life expectancy D) gender inequality
Considerations that complicate our understanding of geologic processes include
A. the very long times required for some kinds of changes to occur. B. the fact that it may be difficult to relate the results of controlled laboratory experiments to natural systems. C. the fact that many different events may have affected one rock during its history. D. All of the choices are correct.