Optical Weather Illusions

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Across
  1. 2. the first thing that is needed to make a rainbow
  2. 4. the appearance of water some distance down the highway on a hot summer day
  3. 5. dust particles can be found here
  4. 9. bands of sunlight shining through breaks in clouds on the horizon.
  5. 11. can often times see a full circle rainbow
  6. 12. the sun makes rainbows when white sunlight passes through these
  7. 13. a ring around the sun or moon produced by refraction from the light
  8. 14. sun dogs that happen at night
  9. 15. colors of light the sun shines onto our planet
  10. 17. common to see around sunrise and sunset
  11. 18. this part of the rainbow has the red on the top and the blue on the bottom side.
  12. 19. these can be found in the upper atmosphere
  13. 20. northern lights in the southern hemisphere
Down
  1. 1. this is what a rainbow is
  2. 3. sunlight shining through a thin, visible screen of these
  3. 6. auroras are most common here
  4. 7. a rainbow at night
  5. 8. raindrops act like these
  6. 10. it happens every 2.7 years and never in the month of February
  7. 16. how many conditions must be met to see a rainbow