Volcanoes

2. relating to the study of the earth's physical structure and substance.
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.
9. releases water vapor and toxic gases into the atmosphere.
10. become active and eject lava, ash, and gases.
11. the action of volcanic debris on the atmosphere, land and water.
13. involving or causing sudden great damage or suffering.
14. the pipe or vent at the heart of a volcano where material wells up from beneath the surface.

1. force or throw (something) out, typically in a violent or sudden way.
3. a volcano that has had at least one eruption during the past 10,000 years.
4. 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.
5. rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way.
6. liquefied by heat; in a state of fusion.
7. no longer in existence; having ended or died out
12. is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and ash.