Quakes
A break in Earth’s lithosphere where one block of rock moves toward, away from, or past another is a ...
Fault
The factor about P and S waves that help scientists find the epicenter of an earthquake is located....
Distance between waves Or differences in arrival time.
Volcanoes that are not associated with plate boundaries. Magma breaks through the crust above a plume or area of rising hot mantle material. An example of volcanoes formed in this way is the Hawaiian islands. This is how volcanoes form at…
Hot Spots
A fast moving avalanche of hot gas, ash, and rock produced by an explosive
eruption is called a…
Pyroclastic Flow
The more silica in the magma the higher the viscosity and the more likely
the eruption will be ___.
Explosive
Energy that travels as vibrations from an earthquake are called what?
seismic waves
____ is the amount of ground motion (Richter scale) and amount of ENERGY RELEASED (Moment magnitude).
Magnitude
When two plates collide, the denser plate subducts. As this plate sinks it melts and forms magma. Magma is less dense than surrounding rock, therefore it rises through cracks in the crust. This is how volcanoes form at…
Convergent Plate Boundries
________________ is tiny particles of pulverized volcanic rock and glass.
Volcanic Ash
The lower the silica in the magma the lower the viscosity and the more likely
the eruption will be __.
Quiet
A scientist that studies earthquakes is called a what?
Seismologist
____ is the the amount of DAMAGE that results from the shaking produced by an earthquake. (Modified Mercalli Scale)
Intensity
When plates separate magma will rise through the vent between them. This commonly occurs at a mid-ocean ridges where new crust is created. This is how volcanoes form at…
Divergent Plate Boundries
Large volcanoes with gentle slopes of basaltic lava often occurring at divergent plate boundaries or oceanic hot spots.
Caldera
What do you do when an earthquake is occurring?
Drop, Cover, Hold
A ______ is the tool used to measure earthquakes, and a read-out from this tool is called a ____.
Seismometer, seismogram
Most earthquakes occur along ____________________ ______________________
Fault Lines
The _____ is an area of earthquake and volcano activity that surrounds the Pacific Ocean.
Ring of Fire
Small steep-sided volcanoes that erupt gas-rich basaltic lavas are…
Cinder Cone Volcanoes
A ________________________ is a vent in Earth’s crust through which melted rock flows.
Volcano
Seismic waves travel through hot material _______, and cooler material _________.
Slower, Faster
The location INSIDE Earth where rock moves and waves originate is the _______________.
Focus
Large steep-sided volcanoes that result from alternating explosive and quiet eruptions often at convergent plate boundaries are…
Composite
Large volcanoes with gentle slopes of basaltic lava often occurring at divergent plate boundaries or oceanic hot spots.
Shield Volcanoes
________________________ a liquid’s resistance to flow. (High = Slow flow, Low = Fast flow)
Viscosity