Name: _______________________________
Stars
Group Activity
Perspective 1Perspective 2
The change in perspective due to a different position is called parallax. What does parallax help scientists determine about a star? __________________________________________________
Use the information beginning on page 700 of your text book to answer the following questions about stars.
1. What is a group of stars that appears to make a pattern in the night sky called? __________________
2. Stars with a temperature above _____________ appear blue.
3. Cool stars appear ___________ red in color.
4. Given that our sun is yellow in color, its temperature must be between __________ and __________.
5. What is a light year? __________________________________________________________________
6. What is apparent magnitude? __________________________________________________________
7. What three factors control apparent magnitude? ___________________________________________
8. The __________________ the apparent magnitude, the dimmer the star. The _________________ the apparent magnitude, the brighter the star.
9. Absolute magnitude is how bright a star _____________________, not just how bright it appears to us here on Earth.
10. What type of diagram shows the relationship between absolute magnitude and temperature of stars? ________________________________
11. Where are main-sequence stars found on the diagram from question 10? _____________________
12. Why are red giants and super giants brighter than red main-sequence stars even though their surface temperatures are the same? ___________________________________________________
13. What is a nebula? __________________________________________________________________
14. How do emission nebulae emit visible light? ______________________________________________
15. What is the birthplace of stars? ________________________________________________________
16. What force causes a nebula to contract? _________________________________________________
17. What is a protostar? _________________________________________________________________
18. What happens when the core of a protostar reaches about 10 million K? _______________________
19. In a main-sequence star, ________________ pulls the star inward on itself and _________________ provides the outward pressure to balance out the inward force.
20. What causes a main-sequence star to expand and become a red giant star? ____________________
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21. Why do red giants have a reddish appearance? ___________________________________________
22. What happens to a star when it runs out of fuel? __________________________________________
23. What are the only types of stars that can create a supernova? _______________________________
24. What do scientists think causes a supernova? _____________________________________________
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25. What types of stars become white dwarfs? _______________________________________________
26. What do white dwarf stars become? ___________________ How many have been observed? _____
27. What is a neutron star? ______________________________________________________________
28. What is a pulsar? ___________________________________________________________________
29. What is a black hole? ________________________________________________________________
