Topic 4 Plate Tectonics

An undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean.

• sea floor spreading

• subduction

• midocean reidge

• ocean trench

An undersea valley that represents one of the deepest parts of the ocean.

• midocean ridge

• sea floor spreading

• subduction

• ocean trench

The process by which molten material adds new oceanic crust to the ocean floor.

• midocean ridge

• seafloor spreading

• subduction

• ocean trench

Tags

NGSS.MS-ESS2-1

The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.

• subduction

• ocean trench

• seafloor spreading

• midocean ridge

Tags

NGSS.MS-ESS2-3

A plate boundary where two plates move toward each other.

• convergent boundary

• divergent boundary

• transform boundary

• midocean spreading

Stress that squeezes rock until it folds or breaks.

• stress

• compression

• shearing

• fault

Term used to describe a volcano that is not currently active but able to become active in the future.

• extinct

• hot spot

• dormant

• tension

The shaking that results from the movement of rock beneath Earth's surface.

• volcano

• lava

• fault

• earthquake

A plate boundary where two plates move away from each other.

• convergent boundary

• divergent boundary

• transform boundary

• midocean ridge

A break in Earth's crust along which rocks move.

• stress

• fault

• shearing

• hot spot