8th Unit 5 Crossword #3

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Across
  1. 2. the relative size of things
  2. 5. a moon phase that looks like more than half a circle from Earth
  3. 6. something we observe to be similar over and over again
  4. 7. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
  5. 9. a moon phase in which the Moon is not visible from Earth
  6. 11. when the Moon is completely dark
  7. 13. the amount of time it takes for a planet to complete one orbit around a star or stars
  8. 14. a planet outside our solar system
  9. 16. a moon phase that looks like a half-circle from Earth
  10. 17. a moon phase that looks like a full circle from Earth
  11. 18. the sun, the planets that orbit the sun, and other objects that orbit the sun
Down
  1. 1. to shine light on an object and make it visible
  2. 3. a rocky sphere that travels around a planet
  3. 4. the nearly circular path a smaller object (like the Moon) travels around a larger object (like Earth)
  4. 7. the shape of the illuminated part of the Moon as it appears from Earth
  5. 8. a moon phase that looks like less than half a circle from Earth
  6. 10. the star that is the main source of light at the center of our solar system
  7. 12. a moon outside our solar system
  8. 15. the border between light and dark on the Moon