1. Astronomy Quiz #2 Jeopardy Review Game

2. GravityLife Cycle of Stars GalaxiesChallenge!The Big Bang and the Universe 100 200100 200 400200 300 600300 400 800400 500 1000500

3. What is gravity’s role in the formation of a protostar?

4. Gravity pulls together the gas and dust in a nebula to form a protostar.

5. What is gravity’s role in the start of nuclear fusion in the core of a star?

6. Gravity pulls hydrogen gas close together, creating a hot and dense environment, allowing nuclear fusion to occur.

7. What two forces must be in balance in order for a main sequence star to remain stable?

8. The inward force of gravity must be balanced with the outward force of energy created by fusion.

9. What is gravity’s role in the creation of a white dwarf?

10. Gravity collapses the core of a star into an extremely dense object.

11. Without gravity, there would be no ____________ (list at least 3 things.)

12. Planets, stars, solar systems, galaxies

13. Stars are formed from a cloud of gas and dust called a __________.

14. Nebula

15. The type of object that a star becomes when it dies depends the star’s ________.

16. mass

17. A star spends most of its life in this stage.

18. Main sequence

19. After the super red giant phase, a very high mass star erupts in an explosion called a _________

20. Supernova or hypernova

21. Name the three objects a star might become when it dies.

22. Black dwarf, neutron star, black hole

23. Name three shapes that galaxies can have.

24. Elliptical, spiral, and irregular

25. Put these structures in order from smallest to largest: universe, star, galaxy, solar system

26. Star, solar system, galaxy, universe

27. What object is located at the center of many galaxies (including ours)?

28. A supermassive black hole

29. In what part of our galaxy is Earth located?

30. In one of the outer spiral arms

31. Which are true? A. All galaxies are the same age. B. All galaxies are moving apart from each other. C. Galaxies contain hundreds of billions of stars.

32. A. False: All galaxies are the same age. B. True: All galaxies are moving apart from each other. C. True: Galaxies contain hundreds of billions of stars.

33. All the matter in the universe came from this object.

34. A singularity

35. The formation of what element in the core of a massive star triggers a supernova?

36. Iron

37. What is a quasar?

38. Quasars are the enormously powerful jets of radiation blasting out from a supermassive black hole.

39. How do we know that dark matter exists?

40. We know dark matter exists because, without it, galaxies would not be held together.

41. How do we know dark energy exists?

42. We know dark energy exists because it is causing the expansion of the universe to speed up.

43. Because of the Big Bang, galaxies are doing this.

44. Moving away from each other

45. About how long ago did the Big Bang occur?

46. About 14 billion years ago

47. Describe two characteristics of the universe immediately after the Big Bang.

48. The universe was extremely hot and it was expanding rapidly.

49. How are galaxies distributed throughout the universe?

50. Galaxies are grouped together in clusters and superclusters.

51. Billions of years from now, what will happen to Earth?

52. Earth will be vaporized as the Sun expands into a red giant. Or, possibly, Earth will be flung somewhere else in the universe as the Milky Way collides with Andromeda.