Classifying Stars By Spectra Activity

Notes
Fill in the blanks.

1. We can learn about the composition of stars based on their _____________________.
2. At specific wavelengths, stars have dark ___________________________ lines on their spectra. We are all familiar with the visible spectrum of a rainbow.
3. Stars are assigned spectral types by the following letters: ____, ____, ____, ____, _____, _____, and _____.
4. Each class is subdivided into more specific divisions with numbers from _______ to ______. Ex) type A4 or A5
5. _________ stars are the hottest and ___________ are the coolest.
6. The Sun is a type _______ star. The sun is a _______________ star, with a surface temperature of ____________.
7. The energy output from the surface of a star per second is called its _______________