Global average air temperatures worldwide
A) have appeared to stabilize after a century of increase.
B) are at present demonstrating no apparent trend one way or another.
C) are being influenced by human-induced changes in the greenhouse effect.
D) are generally lower than 20 years ago.
C
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Which of the following pairs are a renewable energy source?
A) wind and natural gas B) hydrologic and oil C) wind and solar D) coal and wind E) solar and natural gas
Which body in the solar system has the highest level of volcanic activity?
A. Mars B. Io C. Earth D. Jupiter
Which type of mass movement is most common, moves the most material, and causes the most damage?
A)creep B)slump C)mudflow D)rock slide E)avalanche
Rock units that have ages that are not the same in every place are said to be time transgressive. Indicate whether the statement is true or false