Nuclear fusion of hydrogen into helium occurs in the .
1. energy moves through the sun's by means of the rising of hot gas and falling of cooler gas.
2. nearly all the visible light we see from the sun is emitted from the .
3. most of the sun's ultraviolet light is emitted from the narrow layer called the where temperature increases with altitude.
4. we can see the sun's most easily during total solar eclipses.
5. the is the layer of the sun between its core and convection zone.