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volcanoes eruption
| Question | Answer |
|---|---|
| Magma | A molten mixture of rock-forming substances,gases, and water from the mantle |
| Lava | Magma that reaches the surface |
| Viscosity | The resistance of a liquid to flow |
| Silica | A compound made up of particles of the elements oxygen and silicon |
| Pahoehoe | Is fast-moving, hot |
| Aa | Lava that is cooler and slower-moving |
| Volcanic ash | Fine rocky particles as small as a speek of dust |
| Crater | A bowl-area around a volcanoes central vent |
| Vent | Magma leaves the volcano through this opening |
| Cinders | Pebbled size particles |
| Bombs | Particles ranging from the size of a baseball to the size of a car |
| Volcano | A weak spot in the crust where molten material, or magma comes to the surface |
| Pyroclastic Flow | When an explosive eruption hurls out a mixture of hot gases,ash,cinders, and bombs |
| Hot Springs | When undergroundwater heated by a nearby body of magma rises to the surface and collects in a natural pool |
| Element | A substance that cannot be broken down into other subtances |
| Cinder Cone Volcano | When these materials pile up around the vent, forming a steep, cone-shaped hill or mountain |
| Composite Volcano | When alterning layers form a tall, cone-shaped mountain |
| Shield Volcano | When layers gradually build a wide, gently sloping mountain |
| Dike | It forms when magma forces itself across rock layers and hardens |
| Batholith | When a large body of magma cools inside the crust |
| Sill | It forms when magma squeezes between layers of rock and hardens |
| Pipe | This is what magma moves through |
| Magma Chamber | When magma collects in a pocket |
| Dormant | When a volcano is not active now but may become active in the future |
| Active | A volcano that is currently or recently has rumbled or show signs of life |
| Extinct | Volcano is unlikely to erupt again |
| Geyser | A fountain of water and steam that erupts from the ground |
| Caldera | A huge hole left by collapse of a volcanic mountain |
| Lava plateau | A high, level area formed by repeated lava flows |
| Ring of Fire | Formed by the many volcanoes that rim the Pacific Ocean |
Created by:
jjperry
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