The sunspot cycle affects I.the latitude at which sunspots are visible at a given time.II.the number of sunspots that are visible at a given time.III.the rotation rate of the Sun's equator at a given time.IV.the magnetic polarity of the sunspots at a given time.
A)I & II
B)I & IV
C)II & III
D)I, II & III
E)I, II, & IV

Question

Quizplus · Accepted Answer

I. The latitude at which sunspots are visible changes during the course of the sunspot cycle. Sunspots are initially observed at high latitudes, then move towards the equator as the cycle progresses, and eventually disappear altogether before the start of the next cycle.
II. The number of sunspots that are visible follows an 11-year cycle, with a peak in activity followed by a minimum. The cycle is not always exactly 11 years long, and the number of sunspots can vary considerably from cycle to cycle.
IV. The magnetic polarity of sunspots also follows an 11-year cycle. During one cycle, sunspots will mostly have a positive magnetic polarity, while in the next cycle they will mostly have a negative polarity.

The Sunspot Cycle Affects I