Rare Natural Events

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Across
  1. 4. – Natural light display in the polar regions
  2. 6. – Harmful algal blooms causing water discoloration
  3. 9. – Rare meteorological phenomenon involving fiery precipitation
  4. 10. – Light produced by living organisms
Down
  1. 1. – Rare electrical phenomenon
  2. 2. – Optical illusions caused by atmospheric conditions
  3. 3. – Persistent lightning storm in Venezuela
  4. 5. – Circular formations of ice on water
  5. 7. – Optical phenomenon occurring at sunset or sunrise
  6. 8. – Rainbows produced by moonlight