Term
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Definition
opening in the Earth's crust
where lava, ash come through |
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Definition
| molten rock under Earth's surface |
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Term
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Definition
very hot melted rock that comes out of a volcano
above the Earth's surface |
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Definition
Many volcanoes around the Pacific Ocean
plate boundaries |
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Definition
| place in the upper mantle where magma comes up and forms a volcano |
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Definition
| live,one that is erupting |
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Definition
| sleeping, can become active |
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Definition
| dead,not likely to erupt again |
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Definition
| place,where water is naturally heated by earth's interior |
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Term
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Definition
| bowl-shaped area forms at top of volcano |
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Term
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Definition
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Term
| Where do volcanoes happen? |
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Definition
-near boundaries of plates -along edge of continents -islands arcs -along mid ocean ridges |
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Term
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Definition
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Term
| three (3) types of volcanoes |
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Definition
-shield volcano -cinder cone -composite |
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Term
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Definition
-lava -crust -ash cloud -magma chamber conduit -side vent -vent |
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Term
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Definition
1. liquid magma is less dense than the surrounding crust and rises 2. as magma rises, pressure decreases 3. a decrease in pressure allows dissolved gases in the magma to separate out 4. gases rush upward carrying the magma with them |
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Term
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Definition
1. plate boundaries (Ring of Fire) 2. Hot spots (Hawaii) |
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Term
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Definition
1.Quiet eruptions 2. Thin, runny, fluid lava 3. Low in silica, extremely hot 4. gently sloped dome shape 5. Largest of volcanoes-up to 28, 000 feet tall 6. Example: Hawaiin volcanoes (Mauna Loa, Mauna Kea, Kilauea) |
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Term
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Definition
1. Explosive eruptions 2. Lava is thick, cinders and ash 3. High in silica, cooler than fluid lava (but still extremely hot) 4. Steep sided cone shape 5. Smallest of volcanoes-usually no higher than 1000 ft 6. Example: Paricutin |
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Term
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Definition
1. Alternating between explosive and quiet eruptions 2. Lava alternates between thick cinders/ash and thin layers of fluid lava 3. High in silica, cooler than cooler than fluid lava (but still extremely hot) 4. Steepsided symmetrical cone shape 5. Size - up to 8000 ft 6. Examples: Mt. Fuji (Japan), Mt. St. Helens and Mt. Rainier (Washington State) |
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Term
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Definition
1. Active 2. Domant 3. Extinct |
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Term
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Definition
1. Lava plateau 2. Calders 3. Batholith 4. Volcanic neck 5. Sills and dikes 6. Dome mountains |
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Term
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Definition
Thin lava erupts from long cracks, flooods and hardens in a plain. Over time builds up into a plateau |
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Term
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Definition
Massive eruptions empties the vent and magma chamber leaving the volcano hollow. Without internal support, top of the volcano collapses inward. |
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Term
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Definition
| a magma chamber that has cooled into solid rock |
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Term
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Definition
the surrounding volcanic cone is eroded away leaving magma that had hardened in the volcanic pipe |
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Definition
Magma forces itself among rock layers and hardens. Sills are in between two rock layers. Dikes cut across several rock layers. |
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Term
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Definition
smaller bodies of magma (called laccoliths) cause the earth's surface to buldge upward |
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