volcanoes

2. very small fragments of lava or rock blasted into the air by volcanic explosions.
3. term for a volcano that has erupted thousands of years ago, no possibility of eruption.
5. a light, porous volcanic rock that forms during explosive eruptions.
7. volcano steep-sided volcanoes composed of many layers of volcanic rocks, usually made from high-viscosity lava, ash and rock debris.
10. term for a volcano that has recently erupted and there is a possibility that it may erupt soon.
11. of fire area of frequent earthquakes and volcanic eruptions encircling the basin of the Pacific Ocean.
12. liquid rock (magma) that flows out of a volcano.

1. tectonics The theory that explains process of plate movement that creates friction and causes volcanoes is called?
3. occurs when pressure builds up.
4. term for a volcano that has not erupted in a long time, possibility it can erupt in the future.
6. cones circular or oval cones made up of small fragments of lava from a single vent that have been blown into the air, cooled and fallen around the vent.
8. volcano volcanoes shaped like a bowl in the middle with long gentle slopes made by basaltic lava flows.
9. the liquid rock inside a volcano.