Show:
Stars
HR Diagram
Main Sequence Stars
Non-MS Stars
100
What two gases are inside of a star?
Hydrogen and Helium
100
What does HR stand for?
Hurtzsprung and Russel
100
What percentage of stars are main sequence stars?
90%
100
What percent of stars are not main sequence stars?
10%
200
True or False: The sun is a star.
True
200
A HR scale is a measure of a star's _____________ compared to its ___________.
Brightness and Temperature
200
How do all Main sequence stars start?
Nebula
200
What is a massive stars explosion called?
Supernova
300
Absolute magnitude is...
The amount of light a star is actually giving off.
300
What color are hot stars? Cool stars?
Hot - Blue, Cool - Red


300
When a main sequence star burns off all of its hydrogen is explodes into what?
Giant
300
What kind of stars are bright but not hot?
Giants and super giants
400
Stars very in what three things?
Size, temperature, and age


400
What type of line do main sequence stars make in the HR Diagram?
Diagonal 
400
When a giant explodes and contracts, what does it turn into?
White dwarf
400
What kind of stars are hot but not bright?
White Dwarfs