Across
- 6. Volcano Mountain is a cinder cone in central Yukon Territory, Canada, located a short distance north of Fort Selkirk, near the confluence of the Pelly and Yukon Rivers. Volcano Mountain is called Nelrúna in the Northern Tutchone language
- 8. the relatively thin part of the earth's crust which underlies the ocean basins. It is geologically young compared with the continental crust and consists of basaltic rock overlain by sediments.
- 10. Geologically, a volcanic island is an island of volcanic origin. The term high island can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs.
- 13. An earthquake – also called a quake, tremor, or temblor – is the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves.
- 14. coming closer together, especially in characteristics or ideas.
- 16. a small area or region with a relatively hot temperature in comparison to its surroundings.
- 17. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
- 18. In plate tectonics, a divergent boundary or divergent plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other
- 19. The Ring of Fire is a tectonic belt of volcanoes and earthquakes. It is about 40,000 km long and up to about 500 km wide, and surrounds most of the Pacific Ocean
- 20. the powdery residue left after the burning of a substance.
Down
- 1. The Pacific plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million km², it is the largest tectonic plate. The plate first came into existence as a microplate 190 million years ago, at the triple junction between the Farallon, Phoenix, and Izanagi plates.
- 2. Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
- 3. A pyroclastic flow is a fast-moving current of hot gas and volcanic matter that flows along the ground away from a volcano at average speeds of 100 km/h but is capable of reaching speeds up to 700 km/h.
- 4. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 5. the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
- 7. the relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.
- 9. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 11. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
- 12. a destructive mudflow on the slopes of a volcano.
- 15. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.