These are the three types of stresses that occur in the crust.
What are shearing, tension and compression?
100
S waves are also known as..
What are secondary waves?
100
Volcanic belts form along these.
What are the boundaries of Earths' plates.?
100
This is where the magma collect beneath the surface.
What is a magma chamber?
100
The huge hole left by the collapse of a volcanic mountain.
What is a caldera?
200
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle.
What is subduction?
200
Compared to P waves and S waves, SURFACE waves move...
What is slower?
200
The volcanoes along converging oceanic plate boundaries may form these.
What are island arcs.
200
The magma moves through this central feature in the volcano.
What is the pipe or conduit?
200
A wide, gently sloping mountain formed from thin layers of lava pouring out of a vent and hardening on top of previous layers.
What is a shield volcano?
300
A place where two plates slip past each other, moving in opposite directions
What is a strike-slip fault?
300
These are the type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion.
What are P waves?
300
This is an area where magma from deep within the mantle melts through the crust like a blow torch.
What is a hot spot?
300
The more of this material found in magma the thicker the magma is.
What is silica?
300
This land form is created by repeated lava flows our of several long cracks in an area. Runny lava travels far before cooling and solidifying.
What is a lava plateau?
400
This is where a rift valley forms.
What is a divergent boundary?
400
The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake.
What is the focus?
400
At this type of boundary and along this area lava pours out of cracks in the ocean floor creating volcanoes.
What is a divergent boundary at the underwater rift valley?
400
This is a fast moving, hot lava.
What is Pahoehoe?
400
Lava flows alternating with explosive eruptions of ash, cinder and bombs result in this landform.
What is a composite volcano?
500
The Cascade Mountain Range along the west coast of the United States is an example of a feature produced along this type of boundary.
Convergent?
500
Seismic waves carry this away from the focus, through the Earth's interior, and across the surface.
What is the energy of an earthquake?
500
Convergent boundaries along with this cause slabs of oceanic crust to sink through to the mantle, melting the crust into magma to rise again and explode through weak spots in the crust creating volcanoes.
What is Subduction?
500
Another name for sleeping volcano, one that has been inactive, but is expected to awaken in the future.
What a dormant volcano?
500
This steep hill or mountain is formed by thick, stiff lava that produces ash, cinders and bombs and piles up around the vent.