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Volcanoes
| Question | Answer |
|---|---|
| element | a substance that cannot be broken down into other substances |
| viscosity | the amount of stuff in an liquid |
| silica | makes things thicker in a element |
| pahoehoe | hot fat-moving lava |
| aa | cool slow-moving lava |
| compound | a substance made of two or more elements that have been chemically combined |
| lava | magma when it comes out of the volcano |
| volcanic ash | fine rocky particles as small as a speck of dust |
| crater | forms at the top of a volcano around the central vent |
| lava flow | at the top of the volcano around the central vent |
| cinders | pebble sized particles |
| bombs | particles ranging from the size of a baseball to the size of a car |
| magma | a molten mixture of rock-forming substances, gases, and water from the mantle |
| shield volcano | gently sloping mountain formed by repeated lava flows |
| cinder cone volcano | cone shaped mountain formed from ash,cinders,and bombs |
| composite volcano | mountain formed by lava flows alternating with explosive eruptions |
| caldera | hole left by the collapse of of a volcanic mountan |
| magma chamber | a chamber of magma under a volcano |
| batholith | forms when a large body of magma cools inside the crust, this mass of rock will form |
| lava plateau | high, level area formed by repeated lava flows |
| sill | forms when magma squeezes between layers of rock and hardens |
| dike | forms when magma forces itself across rock layers and hardens |
| vent | where the magma leaves the volcano through an opening |
| pipe | a long tube that connects the magma chamber to the Earth's surface |
| hot spring | groundwater heated by a nearby body of magma, rises to the surface and collects in a natural pool |
| geyser | is a fountain of water and steam that erupts from the ground |
| Ring of Fire | formed by the many volcanoes that rim the Pacific Ocean |
| dormant | a volcano that is not unlikely active now but may become active in the future |
| active | a volcano that is erupting or has shown signs that it may erupt in the near future |
| extinct | a volcano that is unlikely to erupt again |
| subduction |
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1965120436
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