Question

question 14
1 pts
how much time passes between two successive sunspot minima?
250 years
10 hours
35 days
11 years
18 weeks

Explanation:

Sunspot activity follows an 11 - year cycle. This cycle is well - established in solar physics. Successive sunspot minima (the lowest points of sunspot activity in the cycle) occur approximately 11 years apart.

Answer:

11 years