Test 3-Astronomy

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Test 3-Astronomy
2010-12-02 10:29:06

About chapters 14 to 23
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  1. The outermost part of the Suns atmosphere is the _______.
  2. Two elements make up the sun. What are these elements and which one is more abundant?
    Hydrogen and Helium; Hydrogen is the most abundant.
  3. Small regions of the Suns surface that are seen to have a north and south magnetic pole are__________.
  4. Another name for the northern lights is the ___________.
  5. What events is most likely to immediately follow an active sunspot?
    Coronal Mass Ejections
  6. 25% of the sun is made up of what?
  7. How is the Aurora on Earth created?
    The charged particles from the Sun interacting with the Earths magnetic field.
  8. The solar wind from the Sun interacts with the Earths magnetic field to produce what?
    B.Northern Lights
    C.Aurora Australis
    D.All of the above
    D. All of the Above
  9. What are the cooler parts of the photosphere caused by the higher magnetic fields?
  10. Einstein found our universe has 4 dimensions he called ______.
  11. The region around a black hole where no escape is possible is called the ____ _____.
    event horizon
  12. When looking for black holes, what do astronomers usually look for?
    A binary star system where the black hole is interacting with its companion
  13. What is the volume of a black hole?
  14. A star that collapses with such mass that not even neutron degeneracy can hold up its weight will become a ____ _____.
    black hole
  15. What idea would Einstein and Newton disagree on?
    that mass can bend light
  16. At the event horizon of a black hole, what is the value for the escape velocity?
    The speed of light
  17. When looking for black holes the emission of _____ from a companion star is sometimes a tell-tale sign of the black hole's existence?
  18. When will our Sun become a black hole?
  19. That radius from an object where the escape velocity equals the speed of light is called the ______ radius
  20. What 'new' technique is being employed to detect black holes?
    Looking for gravity waves
  21. According to Einstein, how could you remove the affects of gravity?
    By falling
  22. In the equation, E=MC2, what does the "M" stand for?
  23. A proposal during the 19th century to explain how the Sun burns was:
    Chemical burning
  24. All stars get their energy by _____.
    nuclear fusion
  25. What 2 forces are in balance near the Sun's surface?
    gravitational and pressure
  26. The type of heat transfer that occurs through the movement of fluids is called
  27. The first process of the P-P cycle fuses two hydrogens to form

    a. deuterium
    b. a positron
    c. a neutrino
    d. all of the above
    D. All of the above
  28. Order the classes from hottest to coldest O-T
    O B A F G K M L T
  29. A star without sodium lines in its spectrum likely
    is too hot to indicate any sodium lines.
  30. The color of a star can give you information on the star's _______.
  31. Which one of the following stars would have a higher surface temperature?
    blue star
  32. How could you tell from Earth if a distant star had a fast spin?
    the spectral lines would be much thicker
  33. "Proper velocity" refers to motion
    perpendicular to us.
  34. "Radial velocity" refers to motion
    towards or away from us
  35. What spectral class is our Sun?
  36. Cierto or Verdad:
    A Light year is longer than a persec.
  37. The distance light travels in one year (5,900,000,000,000 miles) is also called a
    (buuzzzzz) LIGHT YEAR!!!!
  38. What important measurement did RR-Lyrae Variables allow astronomers to get?
  39. How is a 'parsec' defined?
    A parallax of 1 arcsecond if an observer moves 1 AU
  40. When determining distances to celestial objects beyond 300 light years, what technique is often employed?
    Correlation using the H-R diagram
  41. What balances the gravitational force of a star on the Main Sequence?
  42. A K type star will have a ____ compared to our Sun.
    longer life
  43. Why is a red giant cooler than when it was on the main sequence?
    it is much bigger so heat from fusion is spread out
  44. As our Sun ages, how will it move along the Main Sequence line?
    slightly to the right (cooler) and upward (more luminous)
  45. Where did the carbon in your body come from?
  46. The Triple-Alpha process
    occurs at much higher temperatures than hydrogen to
  47. A protostar with a lot of initial mass will fall onto the main sequence ______ and begin at a ______ temperature.
    quickly ... high
  48. What kind of planet would you expect to find the most volcanic activity after a long period of time?
    The larger terrestrial planets
  49. Where would you expect to find planets rich in ammonia in another solar system?
    Much further away from the star where it is very cold
  50. True or False: With only a few exceptions, astronomers had found extrasolar planets identical to what they predicted?
    False with F as in FUCK this!
  51. What would make a nebula spin faster?
    Conservation of angular momentum demands it if the disk shrinks
  52. What percentage of stars that astronomers are investigating contain planets?
    only about 15 percent
  53. Outflow jets from the poles of a protostar are also called
    stellar wind.
  54. What feature about electrons causes degenerate stars?
    Two electrons cannot occupy the same place at the same time
  55. An explosion caused by the sudden collapse of matter within the core of a massive star..............
  56. T or F: All pulsars are neutron stars.
    True bitchhhhh
  57. Atoms heavier than iron are made in ______.