Science 56 Grid Crossword

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Across
  1. 1. system: collection of eight planets and their moons in orbit
  2. 3. all planets orbit
  3. 5. gravitational curved path of an object
  4. 7. process or act of turning or circling around something
  5. 9. the phases where the moon is less than half illuminated
  6. 10. the imaginary line around which a large round object, such as the Earth, turns
  7. 12. they orbit the sun
  8. 13. the alternate rising and falling of the sea
  9. 15. expanding in illumination
  10. 16. orbits around a planet
Down
  1. 2. movement of one object around a centre or another object
  2. 3. one of the four periods of the year
  3. 4. illuminated part greater than a semicircle
  4. 6. the shape of the illuminated (sunlit) portion of the Moon
  5. 8. the partial or total blocking of light of one celestial object by another
  6. 11. decreasing in illumination.
  7. 14. third planet from the sun