Across
- 5. An oceanic tectonic plate that lies beneath the Pacific Ocean.
- 7. Mountains created by volcanic activity.
- 8. A type of plate boundary where two tectonic plates are moving toward each other.
- 9. A volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape.
- 11. The layer of the Earth that lies below the lithosphere. This portion of the Earth's mantle flows like molten plastic despite being solid.
- 12. Molten rock that flows from a volcano onto the Earth's surface.
- 13. A mixture of molten and semi-molten rock found beneath the surface of the Earth.
- 15. A thinner layer of crust (usually made of basalt) found underneath oceans and other bodies of water.
- 17. A path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
- 18. A location where 2 plates meet.
- 19. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Down
- 1. A sudden shaking of the ground caused by movement of tectonic plates.
- 2. The outer layer of the earth, consisting of both the crust and upper mantle.
- 3. A dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.
- 4. A thick layer of crust (usually made of granite) found beneath land masses.
- 6. Rock formed when magma (molten rock) cools and crystallizes
- 9. A island originating from a volcano or volcanic activity.
- 10. A violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water.
- 14. Mixture of rock, mineral, and glass particles emitted by a volcano during an eruption.
- 16. Spot a part of the Earth's mantle where hot plumes rise upward, forming volcanoes on the crust.
