Across
- 7. A powerful thunderstorm that appears as a rotating, funnel shaped cloud
- 8. Small earthquakes which are followed by larger ones
- 9. When two tectonic plates slide against each other on a flat surface
- 10. Located directly above the hypocenter
Down
- 1. Violent and destructive storm
- 2. The hardest layer of the earth's crust
- 3. The scale used to measure the intensity of an earthquake.
- 4. The state of a volcano when it is not active or when it is extinct
- 5. An opening in the earth's crust through which hot molten rock, ash and gases erupt
- 6. Caused by the gravitational pull of the moon and the sun