Volcanoes

4. involving or causing sudden great damage or suffering.
6. liquefied by heat; in a state of fusion.
7. rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way.
8. a scientific field that uses the techniques and methods of structural geology, tectonics, and physics to analyse and interpret physical processes and the associated deformation in volcanic areas, at any scale.
10. force or throw (something) out, typically in a violent or sudden way.
11. releases water vapor and toxic gases into the atmosphere.
12. no longer in existence; having ended or died out

1. to refer to volcanoes that are capable of erupting, and will probably erupt again in the future, but hasn't had an eruption for a very long time.
2. the molten, fluid rock that issues from a volcano or volcanic vent.
3. the pipe or vent at the heart of a volcano where material wells up from beneath the surface.
4. is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and ash.
5. a volcano that has had at least one eruption during the past 10,000 years.
9. relating to the study of the earth's physical structure and substance.
10. become active and eject lava, ash, and gases.
12. the action of volcanic debris on the atmosphere, land and water.