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ch.7 key terms
32 of them!
| Question | Answer |
|---|---|
| a weak spot in the crust where magma has come to the surface | volcano |
| the molten mixture of rock forming substances, gases, and water from the mantle | magma |
| liquid magma that reaches the surface; also the rock formed when liquid lava hardens | lava |
| a major belt of volcanoes that rims the Pacific Ocean | Ring of Fire |
| a string of islands formed by the volcanoes along a deep ocean trench | island arc |
| an area where magma from deep within the mantle melts through the crust above it | hot spot |
| a substance in which all the atoms are the same that cannot be broken down into other substances | element |
| a substance in which two or more elements are chemically joined | compound |
| any characteristic of a substance that can be observed or measured without changing the composition of the substance | physical property |
| any property of a substance that produces a change in the composition of matter | chemical property |
| a liquid's resistance to flowing | viscosity |
| a material found in magma that is formed from the elements oxygen and silicon | silica |
| a hot, fast moving, type of lava that hardens to form smooth , ropelike coils | pahoehoe |
| a slow moving type of lava that hardens to form rough chunks ;cooler than pahoehoe | aa |
| the pocket beneath a volcano where magma collects | magma chamber |
| a long tube which magma moves from the magma chamber to Earth's surface | pipe |
| the opening in which molten rock and gas leave a volcano | vent |
| the area covered by lava as it pours out of a volcanoes vent | lava flow |
| a bowl shaped are that forms around a volcanoes central opening; a large round pit caused by the impact of a meteroid | crater |
| the explusion of ash,cinders,bombs,and gasses during an explosive volcanic eruption | pyroclastic flow |
| a volcano that is not currently active but that may become active in the future | dormant |
| a volcano that is no longer active and is unlikely to errupt again; describes a type of organism that no longer exists anywhere on Earth | extinct |
| a wide, gently sloping mountain made of layers of lava and formed by quiet eruptions | shield volcano |
| a steep cone shaped hill or small mountain made of volcanic ash,cinders,and bombs piled up around a volcanoes opening | cinder cone |
| a tall cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials | composite volcano |
| the large hole at the top of a volcano formed when the roof of a volcanoes magma chamber collapses | caldera |
| a deposit of hardened magma in a volcanos pipe | volcanic neck |
| a slab of volcanic rock formed when magma forces itself across rock layers | dike |
| a slab of volcanic rock formed when magma squeezes between layers of rock | sill |
| a mass of rock formed whhen a large body of magma cools inside the crust | batholith |
| the heating of uderground water by magama | geotheral activity |
| a fountain of water and steam that builds up pressure underground and erupts at regular intervals | geyser |
Created by:
laurenrichardson11
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