The Solar System

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Across
  1. 3. length of time it takes Earth to make 1 rotation around sun
  2. 4. has many rings
  3. 6. planet we live on
  4. 7. time it takes Earth to make one full rotation on its axis
  5. 9. dwarf planet
  6. 14. the main star in our solar system
  7. 15. unit of measure for how far a planet is from the sun
  8. 16. theory that explains how the universe began
  9. 18. caused by the moon's gravity
  10. 19. closest planet to the sun
  11. 20. season when Northern hemisphere is tilted toward the sun
Down
  1. 1. rotation around the sun
  2. 2. type of planet (Earth, Venus, Mars, Mercury)
  3. 5. cloud of dust, gasses, particles in space
  4. 8. believed to have been the cause of a mass extinction
  5. 10. first element
  6. 11. force pulling us toward center of Earth
  7. 12. largest planet
  8. 13. evidence used to determine age of Earth
  9. 17. Earth is tilted on this