What is a Subduction Zone?
what are plates?
Hot Spot
resistance to flow
Richter Scale
shadow zone
The speed and direction of seismic waves
Africa
A change in earthquake activity
What are Convection Currents?
Pyroclastic Material
reversals
a small earthquake
the focus
Elastic Rebound
mafic magma
Epicenter
Seismograph
volcanic dust, volcanic ash, volcanic bombs, volcanic blocks, lapilli
glacier-formed crater lakes
Caldera
on a mid-ocean ridge
Secondary Wave (S Wave)
Volcanism
What is a transform boundary?
A foreshock is
wave that can only travel through solids
portion of earth's surface that is far from plate boundaries and experiences volcanism due to a rising mantle plume
an instrument that records ground vibrations
any activity that includes the movement of magma toward or onto Earth's surface
The sudden return of elastically deformed rock to its undeformed shape
Name four classifications of pyroclastic material
At what location does the first motion of an earthquake occur
The composition of Earth's Interior affects waves how?
An area where no direct seismic waves from a particular earthquake can be detected
The driving force behind plate movements
Viscosity
Earth's crust and part of the upper mantle are broken into sections
fragments of rock that form during a volcanic eruption
The point on Earth's surface directly above the earthquakes focus
Mesosaurus fossils were found in South America and _________
Magnetic field _________ are found on each side of mid-ocean ridges
Which of the following is NOT a tectonic setting where volcanoes form? A) boundaries of tectonic plates B) glacier-formed crater lakes C) mid-ocean ridges D) subduction zones
A magnitude scale that measures ground motion
The San Andreas Fault in California is this type of plate boundary
A large depression formed by the collapse of a volcanic cone
quiet eruptions have what type of magma
Volcanic Eruptions may be signaled by
Region where plates with different densities collide and the denser plate sinks under the less dense plate
Pillow lava forms where