Earth's Rotation, Tilt and Revolution

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Across
  1. 2. A force that make an object follow a curved path
  2. 3. The Earth stays in orbit aroung the sun because of the sun's gravity and the Earth's forward _______.
  3. 5. the amount of time it takes for the Earth to rotate once. (2 words)
  4. 6. The longest day of the year in one hemisphere and the shortest in the other.
  5. 10. The imaginary line running through the center of Earth on which it rotates (3 words)
  6. 12. A circular movement of an object around the center
  7. 13. The way the Earth spins if looking at the North Pole
  8. 15. If it is summer in the Northern Hemisphere, what season is it in the Southern Hemisphere?
  9. 17. Newton's First Law of Motion states that an object at rest stays at _______.
Down
  1. 1. The motion of one object around another object
  2. 4. The direction in which the sun rises
  3. 7. The day that the sun shines equally on both hemispheres and the whole Earth has 12 hours of daylight and 12 hours of darkness.
  4. 8. The force that pulls objects toward the center of Earth
  5. 9. If the earth had no tilt, there would be no _______.
  6. 11. How many exinoxes are there each year?
  7. 14. The amount of time it takes for the Earth to revolve around the sun. (2 words)
  8. 16. The smallest changes in seasonal temperatures are near the _______.