chapter 2

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chapter 2
2011-10-02 00:07:12

Solar system
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  1. what is the star at the center of our solar system?
  2. what is a nebula?
    cloud of gas and dust
  3. what does nebula come from?
    explotion of stars
  4. how are new elements created ?
    nuclear fusion
  5. what are the inner planets classified as?
    • terrestial planets
    • -small and rocky with atmospheres
  6. what are the outer planets classified as?
    gas giants-solids formed of hydrogen compounds, metals and rocks
  7. what is the transition zone between two regions?
    frost line
  8. nuclear fusion triggered in core released ______ and stopped contraction
    solar wind
  9. what is rocky particles and gases coalesce into planets?
    planetesimal accretion
  10. how many classical planets are there?
  11. how many dwarf planets are there?
  12. there are ____ known satelites
  13. what is the site of nuclear fusion?
    solar core
  14. what are the teretrial planets?
    • mercury
    • venus
    • earth
    • mars
  15. what is mercury atmosphere like?
    extreme daytime heat, extreme nightime cold
  16. what is venus atmosphere like?
    hotter then mercury
  17. what is earth atmosphere like?
    hot core with cool enough surface for liquid H2O
  18. what is mars atmosphere like?
    earthlike with dry river channels indicating water
  19. which planets are gas giants?
    • jupiter
    • saturn
    • uranus
    • neptune
  20. what is jupiter atmosphere?
    third brightest in sky after moon and venus
  21. whta is uranus atmosphere like?
    only planet does not rotate perpendicular to eliptic
  22. what is neptune atmosphere like?
    inner two thirds is mixture of molten rock, water, liquid ammonia, and methane
  23. what do objects in solar system include?
    • dwarf planets
    • comets
    • astroids
  24. what is a dwarf planet?
    object in solar system that orbits sun and is not satllite of planet or other celestial body
  25. what are the 5 dwarf planets?
    • haumea, makemake and pluto located in kuiper belt
    • eris located in scattered disk region
    • ceres located in astroid belt
  26. what are the different hypothesis about the moon?
    • capture hypothesis: earths gravity captured a passing planetesimal
    • double planet: earth and moon formed from local cloud of gas and dust
    • Fission: centrifugal force caused piece of earth to sperate
    • impact: easrth hasd collision with mars ejecting part of earth mantle and core into orbit
  27. what is most widely accepted hypothesis about moon?
    impact hypothesis