EMS vocab

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