science vocab2 Flashcards
a small burst of shaking that occurs before a large earthquake.
foreshock
The movement of Earth’s crust.
Earthquake
A tremor that follows an earthquake.
aftershock
The point below earth’s surface and where rock breaks or slips and causes an earthquake.
focus
a region on earth’s surface that is broken and movement occurs.
fault
the point on earth’s surface right above the focus of an earthquake.
epicenter
an instrument that measures and records seismic waves.
seismograph
seismic waves that travel through the interior of the earth.
body waves
seismic waves that reach and travel along earth’s surface.
surface waves
A scale that ranks earthquakes according to the SIZE of the seismic waves.
Richter Scale
A scale that ranks earthquakes according to the energy released.
Moment Magnitude Scale
A scale that rates the damage experienced by buildings, the ground, and people during an earthquake.
Modified Mercalli Scale
A erupting vent through which molten rock and other materials reach earth’s surface.
volcano
An underground melted rock
magma
A location where magma collects inside earth.
Magma Chamber
Magma that has reached earth’s surface.
Lava
The bowl shaped impression formed by the collapse of a volcano after it has erupted.
Caldera
A mound in the vent of an erupted volcano.
Resurgent Dome
A pool of lava that has formed in a caldera.
Lava Lake
A volcano that is erupting or has erupted recently.
Active volcano.
A volcano that is not erupting now, but may erupt in the future.
Dormant volcano.
A volcano that no longer erupts and is in the system of eroding.
extinct volcano
Solid remains of magma that filled the conduit of an extinct volcano.
volcanic neck
A flat and wide volcano that has as low-silica magma and lava with low or high levels of dissolved gas.
shield volcano
