Plate Boundaries Diagram | Quizlet

Divergent Boundaries

exists between two tectonic plates that are moving away from each other

Rift Valleys

formed by two diverging continental plates

Mid-Ocean Ridges (Undersea Ridges)

an underwater mountain system formed by diverging oceanic plates

Seafloor Spreading

the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side

Convergent Boundaries

tectonic plates that move toward one another

TERM

Subduction

DEFINITION

takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced or sinks due to gravity into the mantle

Transform Boundaries

tectonic plates that slide past each

Earthquakes

a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action

Mountain Formation

formed at the boundary of two converging continental tectonic plates

TERM

Trench

DEFINITION

form when one tectonic plate slides beneath another plate at a subduction zone

Volcanic Mountain Range

thick segments of crust that formed by addition of thick piles of volcanic rocks, generally above a subduction zone

Magma

a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth

Plate Boundary

a place where two tectonic plates meet; may be divergent, convergent, or transform

Lithosphere

includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth; subdivided into plates

Asthenosphere

the layer of the Earth that lies below the lithosphere where convection of the mantle takes place

Diagram of a Convergent Boundary

Diagram of a Divergent Boundary

Diagram of a Transform Boundary

Boundary Type that Creates Mid-Ocean Ridges, Volcanoes

Ocean-Ocean Divergent Boundary

Boundary Type that Creates Mountains

Continent-Continent Convergent Boundary

Boundary Type that Creates Rift Valleys

Continent-Continent Divergent Boundary

Boundary Type that Creates Trenches and Volcanic Island Arcs

Continent-Ocean Convergent Boundary

Boundary Type that Creates Faults

Transform Boundary