Earth Moon Sun Vocabulary Crossword Puzzle

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Across
  1. 3. - a rocky sphere that travels around a planet
  2. 4. - an object, diagram, or computer program that helps us understand
  3. 9. - when the Moon is completely dark
  4. 11. - something we observe to be similar over and over again
  5. 12. - the border between light and dark on the Moon
Down
  1. 1. - to shine light on an object and make it visible
  2. 2. by making it simpler or easier to see
  3. 5. - the relative size of things
  4. 6. - the sun, the planets that orbit the sun, and the other objects that orbit the sun
  5. 7. - the amount of time it takes for a planet to complete one orbit around a star or stars
  6. 8. - the shape of the illuminated part of the Moon as it appears from Earth
  7. 10. - the star that is the main source of light at the center of our solar system
  8. 13. - the nearly circular path a smaller object (like the Moon) travels around a larger object (like Earth)