Chapter 12

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  1. The earth spins on its axis once every 24 hours.
    This is called a solar day.
  2. the moon spins on its axis once every 29.5 days,or one lunar day
    this is called a month
  3. states that every object in the universe attracts every other object
    the law of universal gravitation
  4. the___________________ the mass of an object has an even greater gravitational pull of that object
  5. gravitational pull also________as the distance between two objects decreases
  6. Keeps the earth from being pulled to thr sun or hurled through space
    gravity and inertia
  7. the moon is of earths gravity
  8. pulls on objects towards the earths center
  9. the tendancy of matter to stay at rest unless affected by outside force
  10. is caused by the tilt of the earth as it rotates on its axis and revovles around the sun
    change in seasons
  11. the earth is tilted at how many degrees on its axis
    23.5 degrees
  12. is winter in the northeren hemisphere and summer hemisphere in the southeren hemisphere
    Winter solstice
  13. Occurs when neither side of earth's poles is close to the sun.
  14. As the moon revolves around earth and rotates on it's axis, we see portions of the?
    Sunlit side
  15. moon appears to grow
  16. moon appears to shrink
  17. the moon rotates________ as it revolves around the earth
  18. we see less than half but not all of the moons sunlit side
  19. we see more than half but not all moons sunlightside
  20. the moon always faces earth while most of its faces away from the earth
    nearside farside
  21. what occurs when the earth blocks out the sun's light from the full moon ? SEM =Sun , Earth , and Moon .
    lunar eclipse
  22. occurs when the moon passes directly between the sun and earth during a new moon phase.

    SME=Sun,Moon,and Earth
    A Solar eclipse
  23. the periodic rising and falling of the surface level of ocean water
  24. high tides occur on __________________ of the earth at a time and low tides does the same
    two points
  25. In about a 25 hour cycle, most locations on Earth experience how many tides?
    two high tides and two low tides.
  26. —a condition of the greatest difference between low and high tides
    spring tide
  27. —a condition of the least difference between low and high tides
    neap tide
  28. a dark,flat area on the moon's surface filled with hardened lava
  29. who was the first person to land on the moon?
    Neil Armstrong
  30. a lightly colored high peak on the moon is a mountain called a
  31. does not appear to rise at the same time everyday
    the moon
Card Set:
Chapter 12
2012-04-24 00:00:30
Sun Earth Moon

Chapter 12
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