Across
- 2. ranks tornadoes according to their destruction and wind speed
- 5. the heat required to convert a solid into a liquid or a vapor
- 7. a body of air with horizontally uniform temperature
- 9. the sound waves that follow after thunder
Down
- 1. the channel of partially charged air
- 3. a branched channel of positively charged particles
- 4. violet downdrafts that are concentrated in a local area
- 6. violent, whirling column of air in contact with the ground
- 8. extremely powerful storms