Name __________________________________________ Date ______________ Class section _______
Study Guide
Chapter 27-28 Stars & Galaxies and The Sun
Earth Science
1. Stars vary in size from _________________________________ to ____________________________
2. The hottest stars are what color? __________________________
3. The coolest stars are what color? _____________________________
4. What is the color of our sun? ______________________________
5. What is the temperature of our sun? ____________________________
6. What are the letter categories for the temperature classification of stars? _________________________
7. What determines the surface temperature of a star? _______________________________________
8. Stars that are always visible in the night sky ___________________________________
9. The name of the “North Star” ___________________________
10. Distance equal to 9.5 trillion kilometers __________________________________
11. What is the speed of light? ____________________________________
12. Define parallax ____________________________________________________________________
13. The brightness of a star as it appears from earth _________________________________________
14. The true brightness of a star _______________________________________
15. Describe a star with a negative apparent magnitude ________________________________
16. What is the apparent magnitude of Sirius? __________________________________
17. The absolute magnitude is based on brightness at 10 Parsecs or ___________________ light years.
18. The majority of stars are called __________________________________
19. The H-R Diagram puts _________________________________ in the upper right-hand corner.
20. Define nebula ___________________________________________________________________
21. Define protostar _________________________________________________________________
22. At what temperature does nuclear fusion begin? _______________________________ (p. 556)
23. What type of star is our sun? _____________________________________
24. An explosion of a star ______________________________
25. An explosion of a very large star ___________________________
26. A neutron star that emits two beams of radiation as it spins ______________________________
27. Two types of massive collapsed stars ______________________ and __________________________
28. Define constellation _________________________________________________________________
29. Large groups of stars that are bound together by gravity _______________________________
30. What are the 3 types of galaxies? __________________________________________________
31. Which type of galaxy is the Milky Way? ___________________________________________
32. What is red shift? _____________________________________________________________
33. Star-like object gives off radio waves and X rays (12 billion ly from Earth) ____________________
34. Explain the Big Bang Theory ________________________________________________________
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35. Describe nuclear fusion _____________________________________________________________
36. Zone surrounding the sun’s core ______________________________________
37. Area around the sun’s radiative zone ____________________________________
38. The innermost layer of the solar atmosphere ________________________________
39. The color sphere of our sun ______________________________
40. Ions than stream out from our sun into space _________________________
41. Define sunspots ___________________________________________________________________
42 What causes Auroras? ______________________________________________________________
43. Be able to describe the formation of our solar system.