Across
- 2. A great flowing or overflowing of water, especially over land not usually submerged.
- 5. A localized, violently destructive windstorm occurring over land, especially in the Middle West, and characterized by a long, funnel-shaped cloud extending toward the ground and made visible by condensation and debris.
- 8. A brief powerful eruption of particles and intense electromagnetic radiation from the sun's surface, associated with sunspots and causing disturbances to radio communication on earth.
- 10. Outward and downward slope movement of an abundance of slope-forming materials.
- 12. A period of dry weather, especially a long one that is injurious to crops.
- 15. Asteroids that impact the Earth.
- 16. A transient storm of lightning and thunder, usually with rain and gusty winds, sometimes with hail or snow, produced by cumulonimbus clouds.
- 17. A storm with hail.
Down
- 1. Expulsion of magma and gas from the Earth's interior.
- 3. A heavy and prolonged snowstorm covering a wide area.
- 4. An air mass of high temperature covering an extended area and moving relatively slowly.
- 6. A large-scale, atmospheric wind-and-pressure system characterized by low pressure at its center and by circular wind motion.
- 7. An unusually large sea wave produced by a sea quake or under sea volcanic eruption.
- 9. Occurs when a gas, usually CO2, suddenly erupts from deep lake water.
- 11. Caused by natural erosion or human mining makes the ground too weak to support the structures built on it.
- 13. The result of a sudden release of energy in the Earth's crust that creates seismic waves.
- 14. Any large fire that spreads rapidly and is hard to extinguish.