Q380
Sunspots generally wax and wane over a/an
A.
11-year cycle
AnswerB.
25-year cycle
C.
3-year cycle
D.
15-year cycle
Answer: Option A
Solution
Answer: Option A
Solution:
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.