Earth's outer layer; the coolest and least dense layer of Earth. See also core, and mantle.

The layer of Earth beneath the crust. It is about 2,900 km (1, 800 mi) thick, and makes up about 83 percent of Earth's interior. See also core, and crust.

A dense sphere of solid iron and nickel at the center of Earth.

A layer of molten iron and nickel that surrounds the inner core of Earth.

The distance north or south of the equator is measured in degrees. See also longitude.

The distance east or west of the prime meridian in Greenwich, England; measured in degrees. See also latitude.

A mountain-like landform that develops when tectonic plates move apart or separate and a new ocean lithosphere forms.

A process by which a new seafloor is formed from the magma rising from Earth's diverging oceanic plates.

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

A plate Boundary where two plates move toward each other.

A plate Boundary where two plates move past each other in opposite directions.

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

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

A piece of Earth's crust that, according to plate tectonics, is pushed by movement in the Asthenosphere.

The cool, solid outer shell of Earth. It consists of the crust and the rigid uppermost part of the mantle and is

The breakage of a rock into two or more pieces.

The ability of rock to be stretched and then return to its original position once the stress has been removed.

The amount of force being applied to a rock or surface.

Change in volume, size, or shape that results from stress.

A place where pieces of the broken lithosphere meet. Boundary types include convergent, divergent, and transform.

Crust that contains mostly land, ranging from 15 to 70 kilometers (9 to 43 miles) thick.

Crust that lies beneath the ocean, ranging from 5 to 10 km ( 3 to 6 mi) thick.

A force that opposes the motion of objects, which are in contact.

The valley formed by a diverging plate boundary.

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Plate Movement

Term	Definition
Crust	Earth's outer layer; the coolest and least dense layer of Earth. See also core, and mantle.
Mantle	The layer of Earth beneath the crust. It is about 2,900 km (1, 800 mi) thick, and makes up about 83 percent of Earth's interior. See also core, and crust.
Inner Core	A dense sphere of solid iron and nickel at the center of Earth.
Outer Core	A layer of molten iron and nickel that surrounds the inner core of Earth.
Latitude	The distance north or south of the equator is measured in degrees. See also longitude.
Longitude	The distance east or west of the prime meridian in Greenwich, England; measured in degrees. See also latitude.
Oceanic Ridge	A mountain-like landform that develops when tectonic plates move apart or separate and a new ocean lithosphere forms.
Sea-Floor Spreading	A process by which a new seafloor is formed from the magma rising from Earth's diverging oceanic plates.
Divergent Boundary	A plate Boundary where two plates move away from each other.
Convergent Boundary	A plate Boundary where two plates move toward each other.
Transform Boundary	A plate Boundary where two plates move past each other in opposite directions.
Subduction	The process by which oceanic crust sinks beneath a deep-ocean Trench and back into the mantle at a convergent plate Boundary.
Ocean Trench	An undersea valley that represents one of the deepest parts of ocean.
Tectonic Plate	A piece of Earth's crust that, according to plate tectonics, is pushed by movement in the Asthenosphere.
Lithosphere	The cool, solid outer shell of Earth. It consists of the crust and the rigid uppermost part of the mantle and is
Fracture	The breakage of a rock into two or more pieces.
Elasticity	The ability of rock to be stretched and then return to its original position once the stress has been removed.
Stress	The amount of force being applied to a rock or surface.
Strain	Change in volume, size, or shape that results from stress.
Plate Boundary	A place where pieces of the broken lithosphere meet. Boundary types include convergent, divergent, and transform.
Continental Crust	Crust that contains mostly land, ranging from 15 to 70 kilometers (9 to 43 miles) thick.
Oceanic Crust	Crust that lies beneath the ocean, ranging from 5 to 10 km ( 3 to 6 mi) thick.
Friction	A force that opposes the motion of objects, which are in contact.
Rift Valley	The valley formed by a diverging plate boundary.

Created by: user-2013454

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