Color of stars
Stellar Brightness
Hr diagram
100
Why do stars have different colors?
Temperature increase
100
What is stellar brightness?
How bright the star appears
100
What is a HR diagram
Shows the relationship between a star's temperature and its luminosity 
200
What are the most common star color
red dwarfs
200
What is apparent magnitude of brightness?
The brightness of an object as it appears on earth
200
How are stars classified on the HR diagram?
From bottom to top in order of decreasing magnitude
300
What colors can stars be?
Red, orange, yellow, white and blue
300
What is absolute magnitude brightness mean?
The apparent magnitude an object would have if it were located at a distance
300
How is the Hr diagram used to identify stars?
To chart the life cycle of stars
400
What is the highest class of stars?
O, B, A, F, G, K, M
400
How do astronomers measure the brightness of a star?
Using the magnitude scale
500
What is the rarest star classification?
O classification
500
What is a light curve?
A graph that shows the brightness of an object over a period of time