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Volcano Test
Volcano test review- Chapter 3
| Term | Definition |
|---|---|
| volcano | is a weak spot in the crust where molten material comes to the surface |
| Ring of Fire | major volcanic belt formed by the many volcanoes that rim the Pacific Ocean |
| Island Arc | volcanoes that create a string of islands |
| hotspot | an area where magma from deep within the mantle melts through the crust like a blow torch |
| magma chamber | beneath a volcano magma collects in a pocket |
| volcanic pipe | a long tube in the ground that connects the magma chamber to Earth's surface |
| vent | molten rock and gas leave the volcano through this opening |
| lava flow | area covered by lava as it pours out of a vent |
| crater | bowl shaped area that may form at the top of a volcano around the volcano's central vent |
| pahoehoe | fast moving hot lava, looks like coiled rope |
| aa | lava that is cooler and slower moving, looks like crumbled cookies |
| pyroclastic flow | explosive eruptions hurls out ash, cinders, and bombs as well as gases |
| active volcano | live volcano, is erupting or shows signs of erupting soon |
| dormant volcano | sleeping volcano |
| extinct volcano | dead volcano, will not erupt again |
| hotspring | groundwater that is heated by nearby magma and it rises to the surface and collects in a natural pool |
| geyser | a fountain of water and steam that erupts from the ground |
| geothermal energy | water that is heated by magma which provides clean, reliable energy to use |
| shield volcano | lava flows that build a wide, gently sloping mountain |
| cindercone | a steep, cone-shaped hill or mountain |
| composite volcano | tall cone-shaped mountain in which layers of lava alternate with layers of ash |
| magma | Molten rock beneath the earth's surface |
| lava | Magma that reaches Earth's surface |
| At plate boundaries | Where volcanoes typically form. |
| explosive eruption | What type of volcanic eruption will you see a pyroclastic flow? |
| gases | Dissolved _________ trapped in magma under tremendous pressure provide the force for a volcanic eruption. |
| side vent | Magma sometimes forces its way out of the side of a volcano through a what? |
| ash | The smallest lava fragments produced by an explosive eruption (smaller than the size of a grain of sand) |
| Divergent plate boundary (mid-ocean ridge), convergent plate boundary at a subduction zone (two oceanic plates or and oceanic and continental plate) | What are the three areas where volcanoes form? |
Created by:
scorcoran1
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