Across
- 4. An opening on the earth's surface, which allows hot, molten rock
- 6. People who study earthquakes are called
- 7. a long period, it is to be affected by
- 8. and gases to escape from below the surface is called
- 9. Tidal or storm waves are also known as
Down
- 1. Earthquakes can be detected with an instrument called
- 2. If a particular area receives no rain or less rain than normal
- 3. The sudden shaking of the ground caused by movements or
- 5. deep inside the earth is called