Measured variations in the Sun's emission of radiation and observed changes in the earth's climate:
A) are well understood.
B) happen on a 22- year cycle.
C) happen on an 11- year cycle.
D) have not been clearly linked.

Question

Quizplus · Accepted Answer

While there is evidence of variations in the Sun's output of radiation, it has not been clearly linked to observed changes in the earth's climate. The relationship between the two is complex and not yet fully understood. The cycles mentioned in choices B and C refer to the Sun's sunspot cycle, which is separate from its radiation output.

Measured Variations in the Sun's Emission of Radiation and Observed