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Plate Tectonics
| Term | Definition |
|---|---|
| Plate Tectonics | a theory explaining the structure of the earth's crust and many associated occurrences as resulting from the interaction of rigid plates which creep over the mantle. |
| Alfred Wegener | Alfred Wegener was polar researcher, geophysicist and meteorologist |
| Pangea | Pangaea or Pangaea was a super continent that existed during the late Paleozoic and early Mesozoic eras |
| Crust | The Earth's crust is a thin shell on the outside of the Earth, accounting for less than 1% of Earth's volume |
| Lithosphere | the rigid outer part of the earth, consisting of the crust and upper mantle. |
| Asthenosphere | the rigid outer part of the earth, consisting of the crust and upper mantle. |
| Transform Boundary | Transform boundaries are places where plates slide sideways past each other. |
| Sea Floor Spreading | the formation of new areas of oceanic crust, which occurs through the rise of magma at midocean ridges and its subsequent outward movement on either side. |
| Convergent Boundary | A convergent plate boundary is a location where two tectonic plates are moving toward each other, often causing one plate to slide below the other |
| Divergent Boundary | a linear feature that exists between two tectonic plates that are moving away from each other |
| Rift Valley | a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems. |
| Subduction | the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. |
| Convection Current | a current in a fluid that results from convection. |
| Continental Drift Theory | Continental drift was a theory that explained how continents moved on Earth's surface. |
| Trench | a long, narrow ditch. |
| Ocean Basin | an oceanic basin may be anywhere on Earth that is covered by seawater but geologically ocean basins are large geologic basins that are below sea level. |
| Hot Spot | Hot spots are places within the mantle where rocks melt to generate magma. |
| Mid-Ocean ridge | A mid-ocean ridge is a seafloor mountain system formed by plate tectonics |
| Ring of fire | The Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur. |
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