Review Questions for Chp 2



Astronomy Review Questions

1. What does the color of a star indicate?

2. If you have a blue giant star what is the life cycle that it will take?

3. What is the hottest color of a star?

4. The H-R diagram compares what two variables?

5. What are the three types of galaxies?

6. Why are globular star clusters different from open star clusters?

7. How did the universe form? Pick the theory that is supported with the most evidence.

8. Explain two other theories of how the universe formed?

9. The life cycle of a star depends on what?

10. After a white dwarf what is the next stage for this star?

11. Our sun is what type of star and where will it go in the next stage of its life?

12. What is responsible for forming new stars or where do new stars come from?

13. Supernova stars have one of two fates? What are the two fates of supernova stars?

14. How can scientists observe a black hole if no light is able to escape?

15. The majority of stars in the universe are what type of stars?

16. The majority of the life cycle of a star is spent as what star type?

17. Define spectroscopy.

18. Why is a spectroscope reading like a bar code for stars?

19. Explain how a spectroscope works.

20. Define a light year.

21. Are the stars in the sky moving? If so are they moving fast?

22. Why is a red giant red, and so large?

23. A small very hot star that is the leftover center of an old star is what?

24. Under the high pressure of gravity this type of star has all the particles squeezed into neutrons.

25. An extremely massive supernova will become what?

26. What type of galaxy is the Milky Way galaxy?

27. Who discovered the shapes of the galaxies?

28. What is cosmic background radiation and what does it prove?

29. What evidence did Hubble discover that helps support the raisin bread model of the universe?

30. Approximately how old is the universe?

31. Which telescope has a problem with sagging glass due to gravity?

32. Who was responsible for the sun centered theory of planetary motion?

33. Finish this sentence, “Everything with a mass is attracted to everything else with a _________________.”

34. True or False; the big dipper is a constellation?

35. What is the speed of light?

36. What is the function of a telescope?

37. Identify two types of telescopes that must be placed in outer space.

38. What size wavelength of light creates the most damage to living things and what type of electromagnetic radiation is it?

39. Define circumpolar stars and give one example of a circumpolar star.

40. How many types of electromagnetic radiation are there?

41. What was Newton’s most important contribution to astronomy?

42. What does the Earth rotate around?

43. What is the main problem with a reflecting and refracting telescope?

44. Define focal length.

45. What is the function of the objective lens?

46. Why can radio telescopes be so large?

47. What is the main problem with the atmosphere and ground based telescopes?

48. Who came up with the idea that planets move in an elliptical orbit?

49. Which type of electromagnetic radiation could cause cancer in the skin of humans?

50. If a star is 2.2 million light years away how many years does it take light to get to my eye?

51. Define the word revolution.

52. What do the astronomers divide the sky into?

53. Optical telescopes use what type of electromagnetic radiation?

54. Why is a reflecting telescope mirror so much better at seeing color than a refracting telescope lens?

55. Describe the order of the sun, moon, and Earth during a solar eclipse.

56. Describe the order of the sun, moon and Earth during a lunar eclipse.

57. What two astronomical bodies cause the tides? Which is stronger?

58. How does the sun generate energy?

59. What is the formula for generating energy on the sun?

60. What is the main reason for the seasons?

61. Compare direct and indirect rays from the sun.

62. How many phases of the moon are there?

63. How much of the moon is illuminated if viewed from outer space?

64. What does waxing and waning mean?

65. How many tides are there in a day?

66. In summer in Doylestown what kind of rays from the sun are we receiving?

67. Explain Hubble’s Law.

68. Name the four inner planets, in order.

69. Name the four outer planets, in order.

70. Where is the Kuiper Belt?

71. Explain the differences between a meteor, meteorite, meteoroid.

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