Proposed that Earths continents had once been joined as a single landmass that broke apart and sent the continents adrift.

Greek word that means all the earth, suggested that pangaea began to break apart about 200 mya.

Is a device that can detect small changes in magnetic fields.

Happens when the flow in the outer core changes , and the Earth magnetic field changes direction.

Is the study of the history of Earths magnetic field.

Imaginary line on a map that shows time.

Is the theory that explains how new ocean crust forms a ocean ridge and destroyed at deep sea trenches.

Huge pieces of crust and rigid upper mantle that fit together at their edges.

Crust begins to seperate, the stretched crust forms a long, narrow depression.

Convergent boundaries

two tectonic plates are moving toward each other.

Two plate tectonics collide the denser plate eventually descends below the other less dense plate process.

A region where two plates slide horizontally past each other.

plate toward the trench formed at the subduction zone in a process.

The movement of tectonic plates.

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Chapter 17

Term	Definition
Continental drift	Proposed that Earths continents had once been joined as a single landmass that broke apart and sent the continents adrift.
Pangaea	Greek word that means all the earth, suggested that pangaea began to break apart about 200 mya.
Magnetometer	Is a device that can detect small changes in magnetic fields.
magnetic reversal	Happens when the flow in the outer core changes , and the Earth magnetic field changes direction.
paleomagnetism	Is the study of the history of Earths magnetic field.
Isochron	Imaginary line on a map that shows time.
Sea floor spreading	Is the theory that explains how new ocean crust forms a ocean ridge and destroyed at deep sea trenches.
Tectonic plate	Huge pieces of crust and rigid upper mantle that fit together at their edges.
Rift Valley	Crust begins to seperate, the stretched crust forms a long, narrow depression.
Convergent boundaries	two tectonic plates are moving toward each other.
Subduction	Two plate tectonics collide the denser plate eventually descends below the other less dense plate process.
Transform boundary	A region where two plates slide horizontally past each other.
Ridge push	plate toward the trench formed at the subduction zone in a process.
Slab pull	The movement of tectonic plates.

Created by: BriannaBrooks

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