geol/exam1/ch.22

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MoralesG_93
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234918
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geol/exam1/ch.22
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2013-09-15 09:10:46
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geol exam1 22
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geol/exam1/ch.22
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  1. Earth is one of ___ planets that orbit the sun in our solar system
    eight
  2. the sun has no solid surface, but rather it is a huge ball of very hot gas containing ___ % of H (hydrogen), and ___% of He (helium)
    • 75% of H
    • 25% of He
  3. the planets in our solar system orbit the Sun in the same direction
    true/false?
    true
  4. What are the terrestrial planets in our solar system?
    Mercury, Venus, Earth, and Mars
  5. Describe the terrestrial planets
    small, rocky, inner plannets
  6. What are the Jovian planets in our solar system?
    Jupiter, saturn, uranus, neptune
  7. Describe the Jovian planets
    huge, outer planets, also referred to as "gas planets"
  8. What are the small bodies in the solar system called?
    when its 1000km or less in diameter, it is a asteroid and/or a comet
  9. Asteroids are rocky or ____ objects
    metallic
  10. Most asteroids lie in the "asteroids belt" _____ the orbits of Mars and Jupiter
    between
  11. Comets are ___ bodies
    icy
  12. Comets are found in two "reservoirs" called
    !.
    2.
    • 1.The Kuiper Belt (Directly Observed)
    • 2.The Oort Cloud (Theoretical)
  13. Define the Nebular Hypothesis of the origin of the planets
    the solar system originated from a rotating, flattened disk of gas and dust known as the solar nebula
  14.  how did planets and moons form?
    from dust clumping together to form plantesimals which further clumped into planets
  15. The Earth's _____ is its only natural satellite
    moon
  16. the eaths moon is about  ____ the diameter of the Earth
    1/4th
  17. Mercury is the _______ inner planet, and resembles Earth's moon in both size and apperance
    smallest
  18. Mercury has
    1. ____ atmosphere
    2.Large ___ core
    • 1. no atmosphere
    • 2.Large iron core
  19. Venus has the ______ planetary surface in the solar system
    hottest
  20. Venus has a thick ___ atmosphere which creates a _______ effect
    CO2, greenhouse
  21. Mars has a diameter about ____ of Earths and has the most _____-like structures 
    half; Earth
  22. Mars is where our teacher aspires to go... because of all the aspects that make it Earth-like, for example, its thin ___ atmosphere, about __% as thick as Earths
    CO2;1%

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