Vocab I Vocab II Vocab IIIContent IContent II
Hypothesis
An educated guess
Divergent Plate Boundary
Place where 2 places are pulling apart from each other
Rift Valley
Large hole caused by sea floor spreading
Subduction
When ocean crust collides with continental crust and gets pushed down
Convergent Plate Boundary
Place where 2 plates push together and collide
A crack in the earth, where earthquakes can happen
Fault
When plates build up energy and quickly release it, usually causing an earthquake
Elastic Rebound
The point of origin of an earthquake
Focus
The point on the earths surface directly above the focus
Epicenter
A boundary that marks a change in Density between layers
Discontinuity
Shadow Zone
Area on the earth where no seismic waves are recorded. A dead zone
The layer of the mantle where lithosphere plates move
Asthenosphere
Steep sided volcanoes with large fragments of solid material
Cinder Cone
Volcano with Alternating layers
Composite
Viscosity
A measurement of a liquids resistance to flow. Think of a thick milk shake
What is an earthquake
Shaking and vibrating of the earths crust
Which wave can only travel through Solids?
S waves
What is another term for earthquake waves
Seismic waves
These waves are the slowest moving waves, but cause the most destruction
Surface waves
How do you determine how close you are to the epicenter of a quake?
Measure the difference in arrival of the P waves and S waves
Define Magma
Molten rock underground
Define Lava
Magma that reaches the earths surface
What does the Mercalli scale measure
The amount of damage an earthquake causes
What does the Richter scale measure?
The amplitude of an earthquake
What is a hot spot?
A place where lots of volcanoes are