Across
- 2. A severe snowstorm with strong winds and very low visibility.
- 3. To move slowly on hands and knees.
- 6. To move back and forth or up and down quickly.
- 7. Bad weather with strong wind, rain, thunder, or snow.
- 9. The top or outer layer of something.
- 12. An opening in the earth where lava, ash, and gas can come out.
Down
- 1. A storm where strong winds blow sand and dust.
- 4. Moving ridges of water, air, or energy that travel across a surface.
- 5. A sudden shaking of the ground.
- 8. A violent, spinning column of air that touches the ground.
- 10. When a volcano explodes and releases lava, ash, and gas.
- 11. Relating to the large plates that make up the Earth's crust.