3.Which of these layers of the Sun is coolest?
4.what are the appropriate units for the sun's luminosity?
5.Which layer of the Sun do we normally see?
6.The source of energy that keeps the Sun shining today is _________.
7.Energy balancein the Sun refers to a balance between _________.
8.Sunspots are cooler than the surrounding region of the Sun's surface.
9.From center outward, which of the following lists the "layers" of the Sun in the correct order?
10.At the center of the Sun, fusion converts hydrogen intohelium, energy, and neutrinos.