Volcanoes

3. 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. the pipe or vent at the heart of a volcano where material wells up from beneath the surface.
6. become active and eject lava, ash, and gases.
9. force or throw (something) out, typically in a violent or sudden way.
10. relating to the study of the earth's physical structure and substance.
12. releases water vapor and toxic gases into the atmosphere.
13. liquefied by heat; in a state of fusion.
14. no longer in existence; having ended or died out

1. the molten, fluid rock that issues from a volcano or volcanic vent.
2. is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and ash.
4. a volcano that has had at least one eruption during the past 10,000 years.
5. involving or causing sudden great damage or suffering.
7. the action of volcanic debris on the atmosphere, land and water.
8. rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way.
11. 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.