Which of the following 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) many fluctuations of several degrees centigrade
D) fairly steady with occasional cool spells
E) fairly steady with a recent cooling trend

Question

Quizplus · Accepted Answer

The Earth's average surface temperature for the past 900,000 years has seen many fluctuations of several degrees centigrade, as evidenced by ice core data and other climate records. This includes multiple periods of warming and cooling, as well as periods of stability.

Which of the Following Best Describes the Earth's Average Surface