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27 Cards in this Set
- Front
- Back
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Thick and high silica produce what type of volcanic eruption?
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explosive
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What type of plate boundary do tectonic plates move apart?
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divergent
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The theory that explains the cause of earthquakes and volcanoes
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plate tectonics
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Volcanoes form or are located at
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tectonic plates
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What forms at a divergent boundary?
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mid-ocean ridge
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Measures slope of a volcano
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tiltmeter
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Runny lava has how much silica?
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low silica
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Thick lava has how much silica
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high silica
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Volcanic blocks, ash, volcanic bombs
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pyroclastic material
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Where is magma located?
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below ground
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Where is lava located?
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above ground
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What type of volcanoes are made of alternating layers of lava and ash?
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composite
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The tube that magma is pushed up through
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vent
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Opening at the top of the volcano
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crater
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Volcanoes that are currently erupting
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active
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Volcanoes that have erupted in the past, but are not currently
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dormant
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Volcanoes that have never erupted
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extinct
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What type of plated boundary is where two plates collide?
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convergent
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Place on Earth located above a mantle plume
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hot spot
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Type of volcano located in Hawaii
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shield
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What type of lava barely moves?
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blocky lava
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What type of lava is found in the ocean?
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pillow
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What type of lava is smooth?
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pahoehoe
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Largest pyroclastic material
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volcanic blocks
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Large blobs of magma that harden in the air
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volcanic bombs
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Means "little stones"
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lapilli
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Smallest pyroclastic material
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ash
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