astonomy question bank! 3

astonomy question bank! 3 - This is 33. because 34. (1)...

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1. FIRST ANSWER IS THE CORRECT ANSWER 2. The term nucleosynthesis refers to 3. (1) building heavier atoms from lighter ones, starting from hydrogen (the lightest 4. atom), by nuclear reactions 5. (2) chemical reactions involving nuclei, such as combustion 6. (3) the formation of nuclei (central regions) of galaxies 7. (4) NVA 8. (5) NVA 9. 10. 11. 12. The kinds of atoms that make up our bodies were produced in nuclear 13. reactions 14. (1) mostly in the Big Bang and in the cores of stars 15. (2) all in the Big Bang 16. (3) all in the cores of stars 17. (4) NVA 18. (5) NVA 19. 20. 21. 22. Atoms of the element hydrogen and to a large extent those of the element helium 23. were created 24. (1) in a very early stage of the Big Bang 25. (2) in the cores of stars 26. (3) from the breakdown of heavier atoms, by nuclear fission 27. (4) NVA 28. (5) NVA 29. 30. 31. 32. It is sometimes said that the Universe is kind of like a time machine.
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Unformatted text preview: This is 33. because 34. (1) light travels at finite speed, so the time it takes to reach us lets us see 35. things as they were when that light was emitted ("lookback") 36. (2) there are "wormholes" scattered throughout the Universe that allow us to travel 37. backwards in time 38. (3) time was started by the Big Bang 39. (4) NVA 40. (5) NVA 41. 42. We speak of the "observable Universe" as something different from the entire 43. Universe. This is because 44. (1) the Universe is "only" 14 billion years old, so we haven't had time to see things 45. that are farther off than 14 billion light-years 46. (2) we're limited in how far we can see because distant objects are too faint even 47. in the largest telescopes 48. (3) the curvature of space hides distant objects -- there's a cosmic "horizon" like 49. that on the Earth 50. (4) NVA 51. (5) NVA...
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This note was uploaded on 01/16/2012 for the course AST 1002 taught by Professor Dr.haywoodsmith,jr during the Summer '07 term at University of Florida.

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astonomy question bank! 3 - This is 33. because 34. (1)...

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