Sunspots appear because of the magnetic fields, they appear black because they're slightly cooler than the surface of the rest of star.
Pairs? No. Sunspots can be singular, but more often develop in clusters.
Sunspots appear pretty much all the time, but there are more of them during a solar maximum.
Because the sunspots are cooler spots on the sun. They are much different from the rest of the sun so the appear really dark.
Sunspots are transitory and will appear and then disappear without notice. For this reason, they are not given names.
they are in the convective zone
Sunspots
Sunspots appear darker because they are "cooler" than the surrounding area.
Sunspots
No. They do appear in groups. (if your doing SoS good luck ;D!)
In regular photographs, sunspots appear dark because the temperature of surrounding areas is so high that by comparison, sunspots are cool. In reality, they are still immensely hot.
A sunspot is a region on the Sun's photosphere that is cooler and darker than the surrounding material. Sunspots often appear in pairs or groups with specific magnetic polarities that indicate electromagnetic origins.
Surprisingly, almost all sunspots are found in two bands on the Sun, just north and south of the equator. At the start of the cycle, the sunspots appear at latitudes of about 30 degrees, both north and south of the equator. Then, as the cycle continues, more appear at lower latitudes until, at the end of the cycle, most spots appear near the equator.