Life cycles of Stars and HR Diagram
The graph below shows how a star's brightness and surface temperature change throughout its life cycle, as it fuses light elements into heavy elements.
Click this link to view the first activity- here.
This "family portrait" is an HR diagram with five stars on it and a background of the color each star would look through the filter of a spectrophotometer.
Click this link to view the activity-here and answer the 14 questions below. (It says 17,... but was written by a man;-) Circle all of the correct answers for each question. (Good luck getting them wrong, it will not let you move forward until you get it right! ;-)
1. Which of the stars is the oldest in terms of its life cycle? a b c d e
2. Which of the stars is (are) burning Hydrogen as a fuel? a b c d e
3. Which stars are burning helium as a fuel? a b c d e
4. Which of the stars is closest to death? a b c d e
5. Which of the stars has the highest luminosity? a b c d e
6. What causes the star with the highest luminosity to be the brightest? a b c d e
7. Which of the stars has the lowest luminosity? a b c d e
8. The star with the lowest luminosity is the dimmest because of its surface temperature or size? a b c d e
9. Which of the stars has the highest surface temperature? a b c d e
10. Main sequence stars will become red giants when they run out of what fuel? a b c d e
11. Will the three main sequence stars ever become white dwarfs? a b c d e
12. Was Sirius B ever a main sequence star? a b c d e
13. Predict what phase Vega will enter next: a-Red Giant b-Main Sequence c-Black Dwarf d-Variable Stage
14. Predict what phase Betelgeuse will enter next:a-Red Giant b-Main Sequence c-Black Dwarf d-Variable Stage
If you feel you need further review check out these links in order:
HR Diagram Quiz
http://www.purposegames.com/game/astronomy-hertzsprung-russell-diagram-quiz
http://spiff.rit.edu/classes/phys230/lectures/star_age/evol_hr.swf
https://lcogt.net/files/flash/hr-diagram/main.html
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