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Q: What type of solar activity forms arches and loops over the surface of the sun?
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Why do solar flares happen near sunspots?

Sunspots are believed to be the sites where solar flares are generated. Sunspots are known to be "storms" on the sun's surface, but they are not yet fully understood.add The surface of our Sun is about 5800 deg C and above, and naturally most of the material is highly ionized. Thus large electrical currents may be generated, and these in turn cause the magnetic field loops seen as solar activity. These magnetic loops can accelerate the charged ions from the Sun, hence the name Solar Flare..


A contour line that forms a closed loop and has small dashes pointing to the inside of the loop represents what?

Hysteresis loops tell about the magnetic properties of a material. E.g. wider loops indicate that the material is magnetically hard (i.e. it retains magnetisation even if the applied field is removed, permanent magnetics have much wider hysteresis loops)whereas thinner loops represent it to be soft (if the magnetic field is removed, the material doens't show any magentism). This is one advantage of hysteresis loops. further, such loops can identify the grain size of a material and much more. hope it answers your question.


What is the definition of a whorl fingerprint?

Difficult to explain without pictures. Suffice it to say that fingerprints are classified into three basic types - Whorls, Loops, and Arches. For a more definitive explanation or definition you will have to perfrom further research at a location which will be able to supply more visually graphic images.


What are blasts of gas from the sun's atmosphere that sometimes forms enormous loops?

These are "solar prominences" (closely relates to solar flares).


Do magnetic field line complete loops?

no