science

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Across
  1. 3. is the motion of one object around another
  2. 4. an imaginary line around the middle of a planet or other celestial body
  3. 5. dark area on the moon
  4. 8. one of the four phases of the moon when earth lies between the sun and moon
  5. 13. the sliver of the moon occurs when illuminated half of the moon
  6. 16. layers the core,mantle,crust
  7. 17. it happens on or around the 21st days of certain months of the year
  8. 19. between half moon and full moon
  9. 20. the world we live on
Down
  1. 1. the invisible phase of the moon
  2. 2. the many pieces pull each other into orbits
  3. 6. sunlight shines equally on the northern and southern hemisphere
  4. 7. an early version of earth is struck by a slightly smaller space body
  5. 9. the darkest part of the earth
  6. 10. patterns of temperature changes and weather trends
  7. 11. seems to consist of iron and other metals
  8. 12. big heat ball
  9. 14. occurs when a shadow makes the sun or moon seem to grow dark
  10. 15. occur when the moon gravity changes the shape of Earth's ocean
  11. 18. of rotation the ends of the axis are the north and south poles