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Across
  1. 2. The color the sky looks during the day.
  2. 3. Tiny pieces in the air.
  3. 5. To spread out in different directions.
  4. 7. A color with long light waves.
  5. 13. When the Sun comes up in the morning.
  6. 15. What sunlight is made of, like red and blue.
  7. 18. The layer of air around Earth.
  8. 19. The main gas found in the air.
  9. 20. A gas in the air we breathe.
Down
  1. 1. Light that comes from the Sun.
  2. 4. The blue space we see when we look up.
  3. 6. When something takes in light.
  4. 8. Small particles floating in the air.
  5. 9. What helps us see things.
  6. 10. How light travels through space.
  7. 11. When the Sun goes down in the evening.
  8. 12. A tool that splits light into colors.
  9. 14. A colorful arc seen after rain.
  10. 16. Body parts we use to see colors.
  11. 17. A color with very short light waves.