1. Astronomy Unit Review 1. Read the question 2. Write your answer on the white board 3. Write ONLY the answer

2. Question #1 What happens to the color of light as a star moves toward you?

3. Answer: It turns blue. This is due to the Doppler Effect – as objects move toward you,the wavelength shortens and appears more blue.

4. Question #2: What happens to the color of light as a start moves away from you?

5. Answer: It turns red. This is again due to the Doppler Effect – as objects move away from you,the wavelength lengthens and appears more red.

6. Question #3: What happens to the wavelength of light as a star moves toward you?

7. Answer: The wavelength gets shorter. (and appears blue)

8. Question #4: What happens to the wavelength of light as a star moves away from you?

9. Answer: It gets longer. (and appears red)

10. Question #5: What theory says that wavelengths change as objects come toward or away from you?

11. Answer: The Doppler Effect

12. Question #6: What is the theory that says the universe started as one mass and then exploded?

13. Answer: The Big Bang Theory

14. Question #13: What is a body of gases that gives off a tremendous amount of radiant energy in the form of light and energy?

15. Answer: A Star

16. Question #14: Which telescope made it a lot easier to study stars from Earth?

17. Answer: The Hubble telescope

18. Question #15: The spectrum of light emitted from stars tells the …..

19. Answer: Elements present on that star

20. Question #16: We measure distances in space in … (what unit?)

21. Answer: Light years

22. Question #17 The longest stage in a star’s life is …..

23. Answer: Main sequence

24. Question #18: What is the name of a cloud of gas and dust?

25. Answer: A nebula

26. Question #19: What is the process that stars use to generate energy?

27. Answer: Nuclear fusion

28. Question #20: Which element do hydrogen atoms turn into during fusion?

29. Answer: Helium

30. Question #21: What is the name for the large, cool star?

31. Answer: Red giant

32. Question #22: What is the name for a small, hot star?

33. Answer: White dwarf

34. Question #23: What is the name for an explosion in space?

35. Answer: Nova

36. Question #24: When stars contract with a great force and collapse in on themselves, what is created?

37. Answer: Black Hole

38. Question #25 What are small star patterns called?

39. Answer: Constellations

40. Question #26: What is a large group of stars called?

41. Answer: A galaxy

42. Question #27: What is the name of our galaxy?

43. Answer: The Milky Way

44. Question #28: What is the shape of our galaxy?

45. Answer: Spiral

46. Question #29: What are the two main elements in the sun?

47. Answer: Hydrogen and Helium (remember – the sun is just a star)

48. Question #30: What is the outermost layer of the sun?

49. Answer: Corona

50. Question #31: What is the layer of the sun that we see?

51. Answer: Photosphere

52. Question #31: What are the cool places on the sun?

53. Answer: Sunspots

54. Question #32: What are arches of glowing gas that arch above the sun?

55. Answer: Solar prominences

56. Question #33: What are the most violent solar prominences called?

57. Answer: Solar flares

58. Question #34: What are the auroras called?

59. Answer: Northern lights or Southern lights

60. This concludes today’s review activity. Have fun studying!!