earthquakes
energy released as rocks break and move along a fault
earthquake
large with gentle slopes
Shield
Two blocks of rock slide horizontally past each other in opposite directions.
Strike slip
volcanoes that form over plumes in the mantle
Hot spots
energy that travels as vibrations on and in Earth
seismic wave
is the location on Earth’s surface directly above the earthquake’s focus
epicentre
large, steep-sided volcanoes that result from explosive eruptions
composite
Forces pull two blocks of rock apart. The block of rock above the fault moves down relative to the block of rock below the fault.
Normal
measures and records ground motion and
can be used to determine the distance seismic waves
travel.
seismometer
Where do seismic waves originate
The focus
Scientist who study earth quakes are called
seismologists
small, steep-sided volcanoes
cinder cones
Forces push two blocks of rock together. The block of rock above the fault moves up relative to the block of rock below the fault.
Reverse
a graphical illustration of seismic waves,
seismogram
the fastest seismic wave
Primary
Along which type of plate boundary do the deepest earthquakes occur
Convergent
hot liquid that pours out the top of a volcano
lava
Name 2 types of boundaries where volcanoes occur
Convergent and divergent
measures the total amount of energy released by the earthquake.
moment magnitude scale
Slower than P-waves, faster than surface waves
Secondary waves
amount of ground motion measured at a given distance from the earthquake.
Richter scale
fast-moving avalanche of hot gas, ash, and rock that erupts from an explosive volcano
pyroclastic flow
shallow earthquakes occur at what type of boundary?
divergent
Molten rock below Earth’s surface
magma
seismic wave that causes the most damage
Surface