6-1
This type of stress pulls on the crust and makes the rock thinner in the middle.
tension
A device that measures and records the ground movements caused by earthquakes is called
Seismograph
Which type of waves cause the most severe ground movements during an EQ?
surface waves
True or False: Volcanoes are only located an plate boundaries.
False
True or False: All volcanoes have or had a magma chamber beneath them.
True
In a normal fault, which piece of rock goes down?
hanging wall
Name two scales that we talked about that measure an earthquakes damage.
Richter Scale
Moment Magnitude Scale
Mercalli Scale
Earthquakes are caused by the movement of 2 plates grinding on each other. This is called a ____________ boundary.
transform
Where 2 oceanic plates collide, subduction occurs and can create these types of volcanic islands.
Island arcs
The opening at the top of the volcano where the lava comes up and out is called the
Vent
A fold in a rock that bends downward into a valley.
syncline
The higher the rating on an earthquake scale the _________ the damage is.
more, greater, worse...
Name the monitoring device that uses a wire stretched across a fault to detect movement.
Creep meter
What ocean is the ring of fire located around?
Pacific Ocean
Lava that is thin and moves easily and also oozes out slowly has which one:
a. low silica and low viscosity
b. high silica and high viscosity
A. Low silica and low viscosity
The amount of space a rock takes up is called the rock's _________________.
volume
True or False: S waves are the first to arrive to a seismograph.
False
What does the Richer scale measure?
The size of the wave of an earthquake or the damage that is done in an area.
The size of the wave
The Hawaiian islands are an example of this type of volcano.
Hot Spot
Cinders
Which direction do strike-slip fault move?
Up and down Or Side to Side
Side to Side
Which monitoring device has the most accurate data that can detect vertical and horizontal ground movement?
GPS satellite
Name one type of boundary where a volcano is most likely to form.
where plates move toward each other (convergent)
OR where plates are moving away from each other (divergent)
Which stage of a volcano is this:
one that is no longer active but may become active again.
Dormant