VOLCANIC VOCAB!

2. a fast-moving current of hot gas and volcanic matter that flows along the ground away from the volcano that produced it.
4. a path along the Pacific Ocean surrounded by active volcanoes, causing frequent earthquakes.
5. the largest crustal plate on our planet. The plate is presently shrinking as the Atlantic Ocean increases in size.
7. The place where two tectonic plates meet and interact.
12. a volcano formed by Oceanic and Oceanic convergent plate boundaries.
13. a rock formed from the cooling and solidification of molten rock.
15. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
16. the solid outer part of the Earth, above the asthenosphere that includes the upper mantle and the crust of the earth.
18. a plate interaction where the plates hit each other, and both rise creating a triangular shape.
19. Molten rock that has broken the earth's surface.
20. the powdery residue left after the burning of a substance.

1. The denser of the two types of the earth's crust that is made of basalt.
3. The less dense of the earths crusts that is made of Granite.
6. a volcano formed by convergent oceanic and continental plate boundaries.
8. a plate interaction where the less dense plate goes over top of the denser plate.
9. a mountain that lets out lava, tephra, and steam erupt onto the Earth's surface.
10. the upper mantle, below the lithosphere in which there is relatively low resistance to plastic flow and convection is thought to occur.
11. an area of the Earth's mantle where hot material rise upward, forming volcanoes on the overlying crust.
14. Molten rock that is underground.
17. a mixture of water, volcanic ash, tephra, rock fragments, and chunks of ice that can flow like wet concrete.