Natural Phenomena

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Across
  1. 7. - Natural light display in the Earth's sky
  2. 9. - Celestial event when one celestial body is obscured by another
  3. 10. - Tornado occurring over water
  4. 11. - Weather event with falling balls of ice
  5. 13. - Thick mist consisting of water droplets suspended in the air
  6. 15. - Rapid flow of snow down a slope
  7. 17. - Severe snowstorm with strong winds and reduced visibility
  8. 18. - Small body of matter entering Earth's atmosphere
  9. 20. - Hot springs that intermittently eject water and steam
Down
  1. 1. - Downward movement of rock, soil, and debris on a slope
  2. 2. - Large ocean wave caused by underwater seismic activity
  3. 3. - Celestial object with a tail of gas and dust
  4. 4. - Sudden shaking of the ground caused by tectonic movements
  5. 5. - Northern lights, a natural light display in the polar regions
  6. 6. - Multicolored arc in the sky caused by sunlight refracting in raindrops
  7. 8. - Violently rotating column of air
  8. 12. - Strong wind carrying sand and dust, reducing visibility
  9. 14. - Opening in Earth's crust through which lava, ash, and gases erupt
  10. 16. - Electrical discharge in the atmosphere
  11. 19. - Powerful tropical cyclone with strong winds and heavy rain