Elemental Forces of Nature

1234567891011121314151617181920
Across
  1. 1. Air movement caused by differences in atmospheric pressure
  2. 3. A severe snowstorm with strong winds
  3. 5. A large ocean wave caused by an underwater earthquake
  4. 8. A large, rotating tropical storm
  5. 9. The process by which soil and rock are worn away
  6. 13. A sudden electrostatic discharge
  7. 15. The solid surface of the planet or soil
  8. 16. Another term for an earthquake
  9. 17. Severe weather with strong winds and rain
  10. 18. An overflow of water onto land
  11. 19. Ice crystals forming on cold surfaces
Down
  1. 2. A prolonged period of low precipitation
  2. 4. A large mass of snow sliding down a mountainside
  3. 6. A combustion process releasing heat and light
  4. 7. A system of winds rotating inward to an area of low pressure
  5. 10. Precipitation from clouds
  6. 11. A mountain that erupts molten rock
  7. 12. A vital natural resource in liquid form
  8. 14. A spring that ejects water and steam
  9. 20. A rotating column of air in contact with the ground