Solar Activity
Core
The core is the source of all the Sun's energy.The Sun's core has a very high temperature, more than 15 million degrees Kelvin, and the material in the core is very tightly packed or dense. It is a combination of these two properties that creates an environment just right for nuclear reactions to occur.
Radioactive Zone
Where energy is primarily transported toward the exterior by means of radiative diffusion and thermal conduction. Energy travels through the radiation zone in the form of electromagnetic radiation as photons.
Convection ZOne
The convection zone is the outer-most layer of the interior. It extends from a depth of 200,000 km up to the visible surface of the Sun. Energy is transported by convection in this region.
Photosphere
The photosphere is the sun's outer shell from which light is radiated. The photosphere is the deepest layer of the Sun that we can observe directly
Chromospere
The chromosphere is the second of the three main layers in the Sun's atmosphere. The density of the chromosphere is very low, this makes the chromosphere normally invisible and it can be seen only during a total eclipse, where its reddish color is revealed
Corona
A corona is an aura of plasma that surrounds the sun and other celestial bodies. It is most easily seen during a total solar eclipse, but it is also observable with a coronagraph.
Sunspots
a spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings.
Prominence
the fact or condition of standing out from something by physically projecting or being particularly noticeable
Flare
a sudden brief burst of bright flame or light.
Aurora
a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, usually near the northern or southern magnetic pole.
sources
http://spaceplace.nasa.gov/review/sun-corona/corona.en.png
http://www.artinaid.com/wp-content/uploads/2013/02/N%C3%83%C2%BAcleo-Solar.jpg
http://solar.physics.montana.edu/ypop/Spotlight/SunInfo/Core.html
https://en.wikipedia.org/wiki/Radiation_zone
https://www.cora.nwra.com/~werne/eos/text/convection_zone.html
http://www.nasa.gov/mission_pages/iris/multimedia/layerzoo.html
https://en.wikipedia.org/wiki/Corona
goggle definitions
icestories.exploratorium.edu