Lava & Pyroclastic Material | Volcano Mechanics | Volcano Grab Bag | Earthquake Basics | Measuring and Locating Earthquakes |
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Solid material ejected from a volcano
What is pyroclastic material?
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Basaltic
What kind of magma would you expect to find at an oceanic hotspot?
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Caldera
What is the term for the crater on top of a volcano?
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All (convergent, divergent, transform)
At what kind(s) of tectonic plate boundaries do earthquakes occur?
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Seismograph
What device is used to measure earthquakes?
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Lava
What is molten rock called, when it has reached the Earth's surface?
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Continental hotspots
Where will the most explosive volcanic eruptions take place?
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Volcanic Mudflow
What is a lahar?
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Focus
What is the term for the point underground where movement begins in a earthquake?
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Triangulation
You can find the location of an earthquake by plotting its distance from 3 points. What is this process called?
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Ash
What is the smallest, finest kind of pyroclastic material?
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Andesitic
What kind of magma forms volcanic arcs and island arcs?
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Basaltic
What kind of lava are shield volcanoes formed from?
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Aftershock
What is the term for a small earthquake that happens after the main quake?
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Primary wave or P-wave
What kind of body wave will arrive first at an earthquake monitoring station?
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Pyroclastic Flow
What is the term for a superhot avalanche of ash, rock, and gases?
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It has a lot of water in it
Why does subducting oceanic crust melt into magma so easily?
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Lots...
Name 1 volcano on earth that has erupted in recorded human history.
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An oceanic plate snaps upward, and pushes a mass of water with it
Briefly explain how a tsumani happens.
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Station 1
At station 1, the P-wave and S-wave arrive 3 minutes apart. At station 2, the P-wave and S-wave arrive 5 minutes apart. Which station was closer to the earthquake?
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Blocks are solid when ejected from a volcano, bombs are semi-molten
What is the difference between a block and a bomb?
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Divergent Boundaries
Where does a pressure release on the mantle allow magma to easily form?
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The rim of the Pacific Ocean, which is ringed by subduction zones and volcanoes
What is "The Ring of Fire?"
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Between the soil grains
When liquefaction occurs, there can be flooding on the Earth's surface. Where did all the water come from?
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Rayleigh wave
What kind of earthquake wave is Mr. Green simulating?
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