Download Hertzsprung-Russell Activity

Name: _______________________________________________
Hertzsprung-Russell Activity
0
Brightness
6
50,000 oC
3,000 oC
Temperature oC
1. Which star is a red supergiant that is very bright?
2. Which star is dim with a surface temperature of 30,000 oC?
3. Are the brightest stars always the hottest? Explain.
4. What is the relationship between surface temperature and brightness
for main sequence stars?
5. Could a star’s placement on the Hertzsprung-Russell diagram change?
6. The star Procyon B has a surface temperature of 6,600 oC and its
absolute brightness is 13.04. The sun has an absolute brightness of
4.8. What type of star is Procyon B?
7. Star A and B have about the same apparent brightness, but Star A is
about twice as far from Earth as Star B. Which star has the greater
absolute brightness? Explain.
8. Arrange the stars from dimmest to brightest by name.