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Volcanoes
Term | Definition |
---|---|
1. Volcano | A weak spot in the crust where magma comes to the surface. |
2. Lava | Molten rock above the earth's surface. |
3. Magma | Molten material beneath the earth's crust. |
4. Ring of Fire | All the volcanoes on the rim of the Pacific Ocean. |
5. Hot Spot | A region of molten rockbeneath the crust. |
6. Sheild volcano | A broad, domed, volcano with sloped sides. |
7. Composite volcano | A large, steep, volcano built up from layers of ash and lava. |
8. Cinder Cone volcano | A steep, cone shaped, volcano. |
9. Sill | When magma squeezes itself between layers of rock. |
10. DIke | When magma forces itself across layers of rock |
11. batholith | A large body of magma that hardens. |
12. Lava plateau | A high, flat, piece of land built by lava. |
13. extinct | No longer in existence. |
14. dormant | Inactive. Asleep |
15. active | Awake, being in the state of existence. |
16. Element | A substance that cannot be broken down into other substances. |
17. Viscosity | Determines weather a liquid flows fast or slow. |
18. Silica | A substance that makes magma thicker. |
19. Pahoehoe | Hot, fast-moving lava. |
20. aa | Cool, slow-moving lava. |
21. Compound | A substance made of two or more elements. |
22. Volcanic Ash | Fine rocky particles as small as a speck of dust. |
23. Magma chamber | An area underground that hold the volcanoes magma. |
24. Crater | The hole at the top of a volcano. |
25. Vent | A crack in the earth's crust. |
26. Pipe | A vertical hole which magma comes up to a volcano. |
27. Caldera | Happens when a volcano collapses. |
28. Hot spring | A spring of naturally hot water. |
29. Geyser | A hot spring where water shoots up in the air. |