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