Which phrase best describes the earth's average surface temperature for the past 900,000 years?
A) a steady warming trend
B) fairly steady temperatures until recently
C) prolonged periods of cooling and warming
D) fairly steady with occasional cool spells
E) fairly steady with a recent cooling trend
Correct Answer:
Verified
Q9: Greenland's glaciers contain what percentage of the
Q10: The majority of carbon dioxide enters the
Q11: Climate models predict that global warming will
Q12: Carbon dioxide (CO2)levels are closely correlated with
Q13: Major climate models predict _.
A) a 2-
Q15: Nitrous oxide (N20)levels are rising.Each nitrous oxide
Q16: The earth's climate will not change in
Q17: Scientists have attempted to measure historical temperatures
Q18: The concentration of carbon dioxide in the
Q19: The oceans absorb between 25-30% of the
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