1. 2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt

2. A universe that stops expanding only after an infinite Amount of time

3. Flat Universe

4. A universe with enough matter to eventually stop The expansion and recollapse

5. Closed Universe

6. A universe with too little matter to stop the expansion.

7. Open Universe

8. An assumption that the universe is everywhere Uniform and looks the same in any direction in all space and Time.

9. Perfect Cosmological Principle

10. An estimate of the age of the universe obtained by Taking the inverse of a specific constant, only valid If the expansion rate of the universe is constant at all Times in its history.

11. Hubble Time

12. Period of time before 1 million years after the start of the Expansion of the universe, when energy was more Dominant than matter.

13. Radiation Era

14. Radio energy that is nearly uniform in all directions and has a nearly perfect thermal spectrum.

15. Cosmic Microwave Background Radiation

16. The problem that if the universe is infinite in size and age, then the night sky should everywhere be as bright as the sun no matter the direction being looked at

17. Olbers’ Paradox

18. The time about a million years after expansion of the universe began when it became transparent

19. Decoupling Epoch

20. The time about 1 million years after the big bang’s beginning, when most of the ions and electrons In the universe combined to form atoms

21. Recombination Epoch

22. A type of matter that destroys ordinary matter when they come into contact with one another

23. Antimatter

24. The force that caused the expansion of the universe to expand and accelerate

25. Dark Energy

26. The undetectable quantity that helps hold galaxies together. It can be deduced due to gravity.

27. Dark Matter

28. The value of the average density of the universe must equal or exceed if the universe is closed.

29. Critical Density

30. When the charges on the two particles cancel and the Mass of the particles is entirely converted to energy

31. Annihilation

32. The explosive event at the beginning of the universe

33. Big Bang

34. The self-repelling property of space first proposed by Einstein

35. Cosmological Constant

36. Everywhere uniform in appearance so that there is no preferred observing position

37. Homogeneous

38. A brief period of extremely rapid and enormous expansion that may have occurred very early in the history of the universe.

39. Inflation

40. Looking the same in all directions

41. Isotropic

42. Coach Villegas’s favorite NFL team

43. 49ers

44. Coach Villegas’s age

45. 30

46. Coach Villegas’s favorite NBA team

47. Mavericks

48. What do you call a fly with not wings?

49. A walk

50. What gets wetter as it dries?

51. A towel