Unit 6 vocab: plate tectonics
Terms in this set (34)
Upper layer of mantel, below the lithosphere where convection occurs
A solid, thin outermost layer of Earth, thicker and less dense then oceanic crust. Mostly made of granite
Convergent plate boundary
Where two tectonic plates move towards each other
earths crust located under the ocean, less dense than continental and thinner. Mostly made of basalt
Divergent plate boundary
Where two plates separate, creating a Rift Valley
the vibration of Earth produced by the rapid release of energy from rocks that are under stress and break
An area where magma from deep within the mantle melts through the crust above it. Proves that the earths crust is moving
the point on the Earth's surface directly above the focus of an earthquake
A break in the earth's crust
The hypothesis that the continents slowly move across Earth's surface. By convection
The point beneath Earth's surface where rock breaks under stress and causes an earthquake
A dense sphere of solid iron and nickel at the center of Earth
A rigid layer made up of the uppermost part of the mantle and the crust.
the layer of the earth between the crust and the outer core
The transfer of thermal energy by the circulation or movement of a liquid or gas. How heat inside the earth gets to the surface, and it's what causes the tectonic plates to move
the boundary between the earth's mantle and crust
Ring of Fire
A major belt of volcanoes that rims the Pacific Ocean. Caused by Subduction
The process of mountain building
A layer of molten metal that surrounds the inner core made of liquid nickel and iron
Can travel through solids, liquids, and gasses. Move parallel to direction of wave motion. (Push pull). Fast to arrive
A wave produced by an earthquake
A type of seismic wave in which the shaking is perpendicular to the direction of the wave.
in tectonic plates, the site at which an oceanic plate is sliding under a continental plate. Creates mountains and volcanos
transform plate boundary
Boundary between two plates that are sliding past each other.
A giant wave usually caused by an earthquake beneath the ocean floor.
The rising of earths crust due to forces within the earth, related to the motion of tectonic plates
Formed by magma burning a hole in the earths crust
A device that records ground movements caused by seismic waves as they move through Earth. Measures the strength of an earth quake
A scale that rates an earthquake's magnitude based on the size of its seismic waves.
Time when the earthquake is created
Measure of the energy released during an earthquake
An area on earths surface where no direct seismic waves from a particular earthquake can be detected
A supercontinent containing all of Earth's land proposed by Alfred Wagner in theory of continental drift