Science Vocab (Earth's Movements)

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Across
  1. 2. A period of time when high tides are higher and low tides are lower than average.
  2. 4. A force which tries to pull two objects toward each other.
  3. 7. A cycle that the Moon goes through (crescent moon, gibbous moon)
  4. 11. The angle between an object's rotational axis and its orbital axis.
  5. 12. The shape of the moon's sunlit portion as seen from Earth.
  6. 14. A period of time when there is the least amount of difference between high and low tides
  7. 15. Increase in the illumination of the Moon, as seen from the Earth
  8. 16. Any moon that appears more than half-lighted but less than full.
  9. 18. We have four every year
Down
  1. 1. A invisible line around which an object rotates, or spins.
  2. 3. The circular motion of an object around its center.
  3. 5. The shape of the visible part of the moon when it is less than half full.
  4. 6. Half of a sphere
  5. 8. The action by a celestial body of going around in an orbit or elliptical course.
  6. 9. The rise and fall of water level in the oceans
  7. 10. Decrease in the illumination of the Moon, as seen from the Earth
  8. 13. The tide when the water is at its greatest elevation
  9. 17. The time when the sea is at its lowest level