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28 Cards in this Set
- Front
- Back
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hot spot
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An area in earths mantle that is hot enough to melt rock.
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Ash
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Smallest form of tephra
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Shield volcano
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A broad volcano with gently sloping sides
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Caldera
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A large opening that is formed when a volcano collapses
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sill
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Magma that is squeezed into a generally horizontal crack
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Cinder cone volcano
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Made up of lava ash and cinders
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Tephra
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Rock or solidified lava that drops from the air
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Composite volcano
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Varies between quiet and violent eruptions
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Vent
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Opening in Earth's crust which magma flows
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Crater
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A steep walled depression
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Volcano
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An opening in the Earth's surface that often forms a mountain when lava ash and rock erupt
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Dike
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Magma that is squeezed into a vertical crack
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Shield volcano 2 points
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A broad volcano with gently sloping..
Quiet eruptions of silica poor lava so it flows easily example Hawaiian Islands |
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Cinder cone volcano 2 points
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Cinder cone volcanoes are made up of Lava ash and cinders.
Explosive eruptions that throw lava and rock high into the air. |
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Composite volcano 3 points
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Eruptions vary between quiet and explosive eruptions.
An explosive. Can release gas and ash forming a tephra layer... Sound mostly wear earth plates come together and one plate is formed under the other . Example Mount Saint Helens |
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Intrusive
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Rocks that form when magma cools underground
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Batholiths
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The largest intrusive rock formations
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Dike
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Magma that squeezes into vertical cracks between rocks and then hardens
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Volcanic neck
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When erosion wears of volcanic cone away
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Ship rock in New Mexico is an example of
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Volcanic neck
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What type of material makes up volcanoes with broad sloping sides?
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Lava
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Are the eruptions of cinder cone volcanoes quiet or explosive?
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Explosive
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What type of volcano is made of lava, volcanic, ash and cinders
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Composite volcano
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Causes rocks to melt and form magma
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Heat and pressure
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Crater
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Steep walled depression around a volcano's vent
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How are volcanoes related to earth moving plates
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1. Plates moving apart divergent plate boundaries example Mid Atlantic Ridge
2. Plates moving together converging example Caribbean 3. Plates moving over hotspots area and Earth's mantle to melt rock example Hawaiian islands were formed because of hot spots. |
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Igneous rock
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Formed when lava cools and hardens
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Ring of Fire
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A circular pattern located around the Pacific Ocean along plate boundaries where volcanoes are common
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