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plate movement
| Term | Definition |
|---|---|
| crust | The crust is the outermost major layer of the earth |
| mantle | A mantle is a layer inside a planetary body bounded below by a core and above by a crust |
| outer core | The outer core is defined as a well-mixed homogeneous liquid layer of the Earth's interior, situated beneath the mantle |
| inner core | The inner core is the innermost layer of the Earth |
| latitude | latitude is a geographic coordinate that specifies the north-south position of a point on the surface of the Earth or another celestial body. |
| longitude | Longitude measures distance east or west of the prime meridian |
| ocean ridge | oceanic ridge, any of several continuous submarine mountain chains rising from the ocean floor |
| sea-floor spreading | Seafloor Spreading is the usual process at work at divergent plate boundaries, leading to the creation of new ocean floor |
| divergent boundary | Divergent boundaries are places where two or more plates move away from each other |
| convergent boundary | convergent boundary is an area on Earth where two or more lithospheric plates collide |
| transform boundary | Transform boundaries are formed where two tectonic plates pass laterally by one another |
| subduction | the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. |
| ocean trench | Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another |
| tectonic plate | A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere |
| lithosphere | the rigid outer part of the earth, consisting of the crust and upper mantle |
| fracture | A fracture is a partial or complete break in the bone |
| elasticity | elasticity is the property of a solid material to deform under stress (such as stretching, compressing, or twisting) and return to its original shape and size once the external force is removed |
| stress | n science, stress generally refers to two distinct concepts: an internal force per unit area in materials mechanics |
| strain | strain is the measure of the deformation or change in shape/size of a material relative to its original configuration, resulting from applied stress |
| plate boundary | A plate boundary is a three-dimensional, active zone where two or more of Earth’s tectonic plates (lithospheric plates) meet, interact, and move relative to one another |
| continental crust | Continental crust is the relatively thick, buoyant, and old part of Earth’s lithosphere that forms the continents and continental shelves |
| friction | Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact |
| rift valley | rift valley is a linear, steep-sided lowland formed by the subsidence of the Earth's crust between parallel normal faults, created when tectonic plates diverge (pull apart) |
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