Principles of Science Exam

  1. What is the planet with the smallest period of revolution around the sun?
    a) Venus b) Mercury c) Earth d) Pluto e) Neptune
  2. Nearly all the surface feature we see on the moon were made by
    a) volcanoes b) comets c) Sun’s radiation d) Earth’s gravity e) none of these
  3. How does the Sun’s diameter compare to the Earth’s diameter?
    a) 10 times larger b) 50 times larger c) 100 times larger
    d) 500 times larger e) 1000 times larger
  4. Which of the following planets is the largest planet of the solar system?
    a) Jupiter b) Mercury c) earth d) Saturn e) none of these
  5. What is the geometrical shape of the path of the planets of the solar system?
    a) straight line b) circle c) sphere d) ellipse e) none of these
  6. How fast does the sun travel in the Milky Way galaxy?
    a) 140 miles/sec. b) 140 miles/hour c) 140000 miles per second
    d) 140000 miles/hour e) none of these
  7. What is the period of the sun in the Milky Way Galaxy?
    a) 1 year b) 240 years c) 2400 years d) 240000 years e) none of these
  8. During the period of no eclipses, about how long is the Moon’s day (one sun-rise to the next)?
    a) 1 day b) 7 days c) 14 days d) 21 days e) 28 days
  9. How could you say if a bright spot in the night sky is a planet?
    a) from its size b) from its brightness c) from its location
    d) there is no way to say e) none of the above answers is correct
  10. The geological changes of the earth is mainly due to the
    a) influence of the sun b) influence of the moon c) influence of the Zodiac
    d) all of the above e) none of the above
  11. Which of the following does the atmosphere of Mercury contain?
    a) Sulfuric acid b) Methane gas c) Oxygen and nitrogen
    d) Mercury has no atmosphere of any kind e) none of the above
  12. Knowing that it takes about 8 minutes for the sun light to reach the earth, approximately how long
    does it take for the sun light to reach the planet Saturn?
    a) 8 minutes b) 40 minutes c) 3 hours and fifty minutes
    d) five hours and 20 minutes e) none of the above
  13. Distance between two stars is given to be about 1/12 of a light year. How long does it take for the
    light to travel the distance between the two stars?
    a) one day b) one week c) one month d) one year e) none of these
  14. The path of the sun on the celestial sphere is called
    a) ecliptic b) epicycle c) zodiac d) horizon e) none of these
  15. Which of the following theories believes in earth-focused ellipses?
    a) Copernicus b) Aristarchus c) Kepler d) all of these e) none of these
  16. Which of the following theories is an acceptable theory today?
    a) Copernicus b) Aristarchus c) Copernicus d) all of these e) none of these
  17. shooting star is a
    a) Meteor b) meteoroid c) Meteorite c) Asteroid e) none of these
  18. The length of the day on which one of the following planets is about the same as that of the Earth?
    a) Mercury b) Venus c) Mars d) Pluto e) none of these
  19. The approximate number of galaxies in the local group cluster is
    a) one b) 30 c) 30 thousand d) 30 million e) 30 billion
  20. Which way does the celestial sphere appear to move?
    a) east to west b) west to east c) north to south d) south to north
    e) Actually the celestial sphere appears motionless.
  21. The period of revolution of a planet twice as massive as the earth around the sun is
    a) 1-year b) ½-year c) 2-years d) 4-years e) not enough information
  22. What is the minimum temperature for the fusion of hydrogen atoms to fuse?
    a) 2 million K b) 5 million K c) 7 million K d) 10 million K e) none of these
  23. What is the category of radiation of protostars?
    a) Radio b) UV c) X-ray d) all of these e) none of these
  24. The following figure shows the orbit of the planet Jupiter around
    the sun. At which point on the path does Jupiter travel the fastest?
    a) A b) B c) C
    d) D e) the same at all points
  25. At which of the points of the previous question does the planet
    travel the slowest?
    a) A b) B c) C d) D e) the same at all points
  26. What is the largest mass that a star may have?
    a) 30 solar mass b) 300 solar mass c) 3000 solar mass
    d) 30 million solar mass e) none of these
  27. What is the life expectancy of the stars of 10 times solar mass?
    a) 10 million years b) 100 million years c) 1 billion years
    d) 10 billion years e) 100 billion years
  28. How is the heat escaping from a star reproduced?
    a) by chemical reactions b) by pressure inside the core c) by gravitational force
    d) by nuclear fusion e) none of the above
    Sun
    D
    C B
    A
  29. What is the ultimate state of a star after consumption of all its fuel?
    a) yellow giant b) white dwarf c) neutron star
    d) black hole e) depends of the mass of the star
  30. Which of the following elements are involved in the nuclear fusion in sun’s yellow giant state?
    a) Hydrogen b) Nitrogen c) Carbon
    d) all of these e) none of these
  31. Which Earth and the plane of the Earth’s orbit around the Sun ?
    a) change in the day’s length b) change in the season
    c) irregular eclipse occurrence d) all of these e) none of these
  32. Which of the following statements is true for all inner planets of the solar system?
    a) are rocky b) are gaseous c) have moons d) all of these e) none of these
  33. How far away from the earth is the sun
    a) 93 thousand miles b) 9.3 million miles c) 93 million miles
    d) 9.3 billion miles e) 93 billion miles
  34. What percentage of the sun’s composition is oxygen?
    a) 8% b) 14% c) 27% d) 72% e) none of these
  35. What is the density of the Sun’s core?
    a) 212 g/cm3
    b) 180 g/cm3
    c) 92 g/cm3
    d) 78 g/cm3
    e) none of these
  36. What is the temperature of the Sun’s surface?
    a) 4500 K b) 6000 K c) 50000 K d) 1,000,000 K e) 15,000,0000 K
  37. How long is the solar cycle?
    a) One week b) seven years c) 11 years d) 26 years e) none of these
  38. What is the approximate width of the Saturn’s Rings?
    a) 10,000 Km b) 30,000 Km c) 100,000 Km d) 130,000 Km e)
    none of these
  39. The angle of parallax for closer stars compare to that of farther stars are
    a) larger b) smaller c) the same d) depends on the size of the star
  40. Which one of the Jupiter’s following moons is the smallest?
    a) IO b) Europa c) Ganymede d) CalistroIO e)They are all the same size
  41. Which one of the planets of the solar system has the largest number of moons?
    a) Saturn b) Neptune c) Uranus d) Pluto e) Jupiter
  42. Which one of the following planets have the same general composition as the Sun?
    a) Saturn b) Neptune c) Uranus d) all of these e) none of these
  43. Which one of the following planets appear blue?
    a) Saturn b) Neptune c) Uranus d) both (a) and (b) e) both (b) and (c)
  44. What makes the Venus the hottest planet of the solar system?
    a) its size b) its distance from the Sun c) its
    composition
    d) its Atmosphere e) none of these
  45. What happens to the spectral lines of a star that moves towards the earth?
    a) nothing b) will be red shifted c) will be blue shifted
    d) depending on its intensity may be red or blue shifted e) depends on its speed
  46. Which of the following can be used to determine the temperature of a star?
    a) Wein’s law b) Boltzmann law c) Doppler law d) none of these 46. How
    many times does the moon spin around its axis in a month?
    a) 0 b) 1 c) 2 d) 14 e) 28
  47. What is the reason for the spherical shape of the earth?
    a) sun’s gravity b) moon’s gravity c) both of these d) none of these
  48. The earth bulges at the equator due to
    a) its daily spin b) its yearly motion around the sun c) moon’s gravity
    d) all of the above e) none of the above
  49. Which of the following weighs more, a cubic foot of lead or a cubic foot of Styrofoam?
    a) lead b) Styrofoam c) weigh the same d) not enough information given
  50. Which of the following has not any role in sculpturing of the surface of the Earth?
    a) differentiation b) subduction c) rifting d) convection e) all of these do
  51. What is the critical dimension of a rock in outer space to pull itself in a round shape?
    a) 21 km b) 100 km c) 212 km d) 350 km e) none of these
  52. What is the approximate thickness of the earth’s atmosphere?
    a) 21 km b) 100 km c) 212 km d) 350 km e) none of these
    53 The lack of internal heat in interior of the moon is due to the moon’s
    a) different composition b) lack of atmosphere c) distance from the sun
    d) lack of radioactive materials e) none of the above
  53. What is the function of the ozone layer in the earth’s atmosphere?
    a) trap the charged particles radiated by the sun b) increase the oxygen in the atmosphere
    c) reduce the green-house effect d)absorb the sun’s UV radiation e) none of these
  54. Which of the following theories of origin of the moon supports the lack of substances of low
    melting temperature on the moon?
    a) capture theory b) twin formation theory c) fission theory
    d) all of the above e) none of the above
  55. Which of the following theories justifies the tilt in the spin axis of the earth?
    a) capture theory b) twin formation theory c) fission theory
    d) all of the above e) none of the above
  56. What is the smallest size crater on the moon?
    a) 240 km b) 24 km c) 2.4 km d) 1 km e) much smaller than 1-km
  57. Based on the capture theory the composition of the moon is expected to be
    a) the same as that of the earth b) completely different than that of the earth
    c) partially the same as that of the earth d) there is no way to say
  58. Based on the twin formation theory the composition of the moon is expected to be
    a) the same as that of the earth b) completely different than that of the earth
    c) partially the same as that of the earth d) there is no way to say
  59. Based on the fission theory the composition of the moon is expected to be
    a) the same as that of the earth b) completely different than that of the earth
    c) partially the same as that of the earth d) there is no way to say
  60. Spin direction of which of the following planets is opposite to that of the Earth’s?
    a) Mercury b) Venus c) Uranus d) Neptune e) None of these
  61. Which of the following planets is the hottest planet of the solar system?
    a) Mercury b) Venus c) Earth d) Mars e)
    Jupiter
  62. What is the approximate distance of Venus from the sun?
    a) 0.2 AU b)0.4 AU c) 0.7 AU d) 1.4 AU e) 1.7 AU
  63. What is the ratio of the sun’s mass to that of the earth?
    a) 10 b) 10000 c) 30000 d) 300000 e) none of these
    a) Venus b) Mars c) Jupiter d) Saturn e) Uranus
  64. Which of the following could possibly be the temperature of the sun spots?
    a) 4500 K b) 6000 K c) 45000 K c) 15 Million Kelvin e) 200 million K
  65. What is the ratio of the volume of the earth to that of the moon?
    a) 4 b) 16 c) 48 d) 64 e) none of the above
  66. What is the approximate number of days in one earth week on the moon?
    a) 0 b) 1 c) 9 d) 12 e) there is no way to tell

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