Sunspots generally wax and wane over a/an
A. 11-year cycle
B. 25-year cycle
C. 3-year cycle
D. 15-year cycle
Answer: Option A
Solution (By Examveda Team)
Sunspots generally wax and wane over an 11-year cycle. Centuries of observations have shown that the number of sunspots waxes and wanes over a roughly 11-year period. Sunspots exhibit other predictable behavior.This Question Belongs to Geography >> Miscellaneous World Geography
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