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60 Cards in this Set
- Front
- Back
magma that is a mix of basaltic and rhyolitic; eruption may or may not be explosive
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andesitic magma
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magma that has low viscosity and low silica and gas content; eruption is non-explosive
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basaltic magma
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volcano formed of volcanic rock and ash; erodes quickly
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cinder cone volcano
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volcano that is steep and tall; formed of lava and volcanic debris
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composite volcano
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non-explosive or very mild volcanic eruption
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Hawaiian eruption
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an active area of volcanoes due to a consistent source of magma in the asthenosphere
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hot spot
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the most powerful, most explosive volcanic eruption
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plinian eruption
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volcanic flow that contains a high concentration of gases, ash, and small rocks
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pyroclastic flow
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magma that has a high viscosity and high silica and gas content; eruption tends to be very explosive
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rhyolitic eruption
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volcano that has tall, broad slopes; formed by repeated, gradual lava flows
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shield volcanoes
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an intermittent explosive volcanic eruption
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strombolian eruption
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ability of a substance to resist flowing
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viscosity
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the three parts of a volcano:
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magma chamber, central vent, crater
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the lava least likely to form a pyroclastic flow
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basaltic
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the height of a volcano determines its explosive power t/f
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false
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volcanic eruptions occur because of : (3)
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magma that needs to be released, plate tectonics, and stress and pressure
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The ring of fire is where many volcanoes occur because the ____ plate is subducted in nearly every region
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pacific
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plinian eruption
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rhyolitic
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hawaiian eruption
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basaltic
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strombolian eruption
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andesitic
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energy produced from the heat of magma and other volcanic materials
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geothermal energy
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an avalanche of water, mud, and other materials that a volcanic eruption can produce
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lahar
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volcanic rock and debris that is blasted from a volcano during an eruption
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tephra
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what state was formed by volcanic explosions?
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hawaii
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the respiratory system can be injured by inhaling ___
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ash
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Determine if these are hazardous, beneficial, or both.
pyroclastic flows |
h
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volcanic ash
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hb
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geothermal energy
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b
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lahars
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h
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lava flows
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h
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volcanic materials
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b
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an areas climate can be altered by a volcanic eruption t/f
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true
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what are lahars?
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mud flows
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what is tephra?
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solid material blasted into the air
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volcanic eruptions can ________
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help create land
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they also form ______
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our atmosphere
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Volcanic eruptions help make soil _____
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fertile
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makes useful products like _________
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metals, gems, and building supplies
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instrument used to measure volcanic gases
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correlation spectrometer
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gassy smoke released by a volcano
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plume
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instrument used to measure ground swelling
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tiltameter
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what kind of volcano is most expected to erupt?
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active
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how can a scientist predict how explosive a volcano will be?
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by studying the composition of the rock
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warning signs that a volcano will soon erupt? (3)
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earthquakes or tremors, ground swelling, smoke plumes
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volcano is emitting gases.
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COSPEC
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small tremors are occurring.
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seismograph
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The ground by a volcano is moving upward.
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tiltameter
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Through monitoring, scientists can predict a volcanic eruption; the problem is that they don't always have the resources to enable them to do so. t/f
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true
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a large mass of hardened igneous rock beneath all layers of sedimentary rock
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batholith
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vertical intrusion of magma between rock layers
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dike
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igneous rock that forms on Earth's surface
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extrusive
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a volcanic island undersea that has been cut off by wave erosion
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guyot
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intrusive rock that pushes its way between sedimentary strata in the shape of a dome
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laccolith
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an underwater volcano
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seamount
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horizontal intrusion of magma between rock layers
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sill
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tall feature that forms when the sides of a volcano erode, leaving the rock that filled the central vent of the volcano
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volcanic neck
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Which intrusive feature may start as a sill but, as more magma builds, push upward like a lens?
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laccolith
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you can usually tell the difference between calderas and craters by studying ________
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a feature's size and formation
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If you see a very tall, rock feature that looks like a jagged, rectangular block sticking out of the ground, you're probably observing a _____.
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volcanic neck
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what is the ring of fire?
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a ring of volcanoes around the pacific
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