Ch 25
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a system of mountains on the sea floor separated by valleys
mid-ocean ridge
a long narrow depression
rift valley
The boundary where two plates collide
convergent plate boundary
denser plate dives beneath a lessens plate
subduction
the boundary between two plates that are moving apart
divergent plate boundary `
plates slide horizontally past each other in opposite directions
transform plate boundary
divergent and transform
compresion tention and shier
• compresion stress
what are two types of deformation
• elastic 2. plastic
how many types of seismic waves are there
primary waves secondary (s) waves surface waves
what types seismic waves is the fastest?
primary waves
what type of wave is a primary wave?
what types of material can they pass through?
solids and liquids
what are the two scales that help measure major earthquakes
richter scale
what does the marcoly scale measure
damage