Volcanoes

1. releases water vapor and toxic gases into the atmosphere.
2. the pipe or vent at the heart of a volcano where material wells up from beneath the surface.
3. the molten, fluid rock that issues from a volcano or volcanic vent.
4. 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.
5. the action of volcanic debris on the atmosphere, land and water.
6. become active and eject lava, ash, and gases.
7. is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and ash.
10. a volcano that has had at least one eruption during the past 10,000 years.
11. relating to the study of the earth's physical structure and substance.
12. rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way.
13. no longer in existence; having ended or died out

1. force or throw (something) out, typically in a violent or sudden way.
2. involving or causing sudden great damage or suffering.
7. is a bowl-shaped depression, or hollowed-out area, produced by the impact of a meteorite, volcanic activity, or an explosion.
8. liquefied by heat; in a state of fusion.
9. 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.