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15 Cards in this Set
- Front
- Back
Crater |
Funnel-shaped opening at the top of a volcano |
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Caldera |
Formed when a part of a wall collapses following an explosive eruption |
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Viscosity |
Liquid's thickness and stickiness |
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Temperature of magma affects it's viscosity |
The higher the temperature of magma is, The lower its viscosity is. |
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Silica content of magma affects it's viscosity |
Magma's with high silica content are more vicious than those with low silica content |
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Gas of magma affects it's viscosity |
Gas dissolved in magma tends to increase its ability to flow. Loss of gases makes magma more vicious |
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Phreatic or Hydrothermal |
Hot rocks come in contact with water |
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Phreatomagmatic |
Contact between water and magma |
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Strombolian |
Fountain lava |
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Vulcanian |
Tall eruptions that reach up to 20km high |
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Plinian |
Excessively explosive type of eruption of gas and pyroclastics |
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Shield volcanoes |
Formed by the accumulation of lava |
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Cinder cone |
Built from ejected lava fragments |
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Composite cones |
Nearly perfect sloped structure. Solidification of both lava and pyroclastic deposits |
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Geothermal Energy |
Source of energy that is in the heat from the earth's interior |