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Volcanoes
| Question | Answer |
|---|---|
| vocano | is a weak spot in the crust where molten material, or magma, comes to the surface |
| Lava | When magma reaches the surface |
| Magma | A molten mixture of rock-forming substances, gases, and water from the mantle |
| Ring of Fire | formed by the many volcanoes that rim the pacific ocean |
| Hot spot | is an area where material from deep within the mantle rises & then melts forming magma. |
| shield volcano | Gently sloping mountain formed by repeated lava flows |
| Composite Volcano | Cone shaped mountain formed from ash cinders and bombs |
| Cinder cone Volcano | Mountain formed by lava flows alternating with explosive eruptions |
| Sill | forms when magma squeezes between layers of rock and hardness |
| Dike | forms when magma forces itself across rock layers and hardens |
| Batholith | When a large body of magma cools inside the crust a mass of rock called batholith forms |
| Lava plateau | some eruptions of thin runny lava flow out of cracks and travel a long distance before cooling and hardening over millions of years these layers of lava build up over a large area to form a lava plateau |
| Extinct | A volcano that is no longer active or that probably wont erupt again |
| Dormant | A volcano that has not erupted in 200 years and is asleep but can erupt any moment |
| active | A volcano that always has a chance of erupting or erupts or common for that volcano |
| element | A substance that cannot be broken down into other substances |
| viscosity | The physical property of liquids |
| silica | made up of particles of the elements oxygen and silicon |
| pahoehoe | fast moving hot lava that has low viscosity |
| AA | Lava that is cooler and slower moving |
| compound | A substance made of two or more elements that have been chemically combined |
| volcanic ash | Fine rocky particles as small as a speck of dust |
| magma chamber | A place underground that holds all of the magma and is connected to the pipe |
| crater | A bowl shaped area that forms around a volcanoes central vent |
| vent | A place where the lava comes out of the volcano |
| pipe | A pipe connecting from the magma chamber to the vent |
| caldera | When the top of a volcano blows up & inside sinks in & makes a bowl shaped hole the magma chamber empties out & the roof of the volcano foes inside the magma chamber |
| hotspring | is an area where material from deep within the mantle rises & then melts, forming magma creating islands |
| geyser | type of hot spring that erupts as a fountain of water and steam |
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