Plate tectonics
The crust and the upper area of the mantle
What is the lithosphere?
When the rocks along a plate boundary shift suddenly and release their stored energy
What is an earthquake?
The beginning point of an earthquake
Molten rock
What is magma?
volcanoes that have gradually sloping sides
large pieces that float on the partly melted rock of the earth's mantle.
What are plates?
What are faults?
The vibrations that flow out from the focus in all directions
When a crack in the earth's crust allows magma and gases to come to the surface
What is a volcano?
This volcano resembles a hill and has a bowl-like crater
What is a cinder-cone volcano?
The idea that the earth's crust is made up of moving plates
What is the theory of plate tectonics?
rocks push together and force a section of rock upward
What is a reverse fault?
The point above the surface
What is the epicenter?
pockets of molten rock deep in the Earth's lithosphere
What are magma chambers?
A large symmetrical cone-shaped volcano
What is a composite cone volcano?
Crust, mantle, and core
What are the main parts of the earth?
The rocks move horizontally past each other
What is a strike-slip fault?
waves that occur beneath the surface of the earth and can be either primary or secondary waves
The bowl shape at the top of a main vent
What is a crater?
A mixture of cinders, ash, and rock
Places where the plates meet
What are plate bounaries?
The rocks move apart and a section of rock may fall between the separating rocks
What is a normal fault?
Slow moving waves that are the most destructive with two types being Love and Rayleigh
What are Surface waves?
places where a pool of intensely hot magma rise toward the surface
The red-hot dust and gases that come from a Pelean eruption
What is the pyroclastic flow?