Across
- 4. a large, destructive fire that spreads quickly over woodland or brush
- 7. environmental phenomena that have the potential to impact societies and the human environment
- 10. a large area of low pressure and cold air surrounding both of the Earth's poles
- 11. pellets of frozen rain which fall in showers from cumulonimbus clouds.
- 13. a depression or hole in the ground caused by some form of collapse of the surface layer
- 16. natural hazard that usually results in serious damage and many deaths
- 17. a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface
Down
- 1. when a gust front or other strong wind blows loose sand and dirt from a dry surface
- 2. loose wet sand that yields easily to pressure and sucks in anything resting on or falling into it
- 3. a mobile, destructive vortex of violently rotating winds having the appearance of a funnel-shaped cloud and advancing beneath a large storm system
- 5. an overflow of water that submerges land that is usually dry
- 6. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action
- 8. a prolonged period of abnormally low rainfall, leading to a shortage of water
- 9. a rapidly rotating mass of water in a river or sea
- 12. a small body of matter from outer space that enters the earth's atmosphere
- 14. a tropical storm with winds that have reached a constant speed of 74 miles per hour or more
- 15. a prolonged period of abnormally hot weather