Astronomy Unit Three Quiz 20-23

  1. The different chemical makeup observed on the different planets can be explained by_______.
    The temperature variation present in the early solar system accretion disk
  2. The separation of materials while in a molten state due to their intrinsic density is called_______.
  3. What holds planetisimals together in the proto-planetary accretion disk?
  4. Early in the formation of a proto-star, small, dust-sized particles are held together by _______.
    Coulomb forces
  5. The main characteristic of the atmosphere that determines the boundaries of the various named layers of the atmosphere is________.
    The algebraic sign of the change in temperature with change in altitude
  6. Mercury orbits the sun in 88 Earth days, but only needs _________ Mercury(Sidereal) days to orbit the sun.
    1 1/2
  7. The precession of Mercury's perihelion is _______.
    Almost exactly what Einstein predicted
  8. A heavily cratered planetary surface is indicative of _______.
    An old surface
  9. The bombardment history of the solar system leads us to conclude that ______.
    Heavily cratered surfaces must be old
  10. Mercury, Venus, Earth and Mars are called the _______ planets.
  11. If 1000 millibars is the average barometric pressure at sea-level on the Earth, then the barometric pressure on the surface of Venus would be ______ millibars.
  12. In the early 1990's the Magellan Spacecraft mapped the surface of Venus using ________.
  13. Both Mercury and Venus rotate ___________.
    Very Slowly
  14. The thick atmosphere of Venus _______ lots of small craters.
  15. Venus' extreme rotation rate makes the Coriolis Effect on Venus produce surface winds __________.
    That are essentially non-existent
  16. If the average barometric pressure at sea-level on Earth is 1,000 millibars, then the average barometric pressure on the surface of Mars would be ________ millibars.
  17. The process of a solid changing phase straight to a gaseous form is called__________.
  18. The atmospheres of Venus and Mars are similar in their _______.
    CO2 content
  19. Even though all are extinct, the only type of volcanoes on Mars are ________ type volcanoes.
  20. ALH84001 is a meteorite found on Earth and is proven to be from Mars because of its _______.
    All of the above
Card Set
Astronomy Unit Three Quiz 20-23