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ESPS Review
Ivan Ramirez, SFS A3
| Term | Definition |
|---|---|
| Crater | A bowl-shaped area that is made around a volcano's central opening |
| Lithosphere | A rigid layer of the earth composed of the uppermost part of the mantle and the crust. |
| Mantle | A hot layer of solid material that is between Earth's crust and core. |
| Crust | The layer on of the earth. |
| Asthenosphere | A soft layer of the mantle on where the lithosphere floats. |
| Mesosphere | The strong, lower part of the mantle between the asthenosphere and the outer core. |
| Core | Center of the earth. |
| Ejecta | Substance emitted by an active volcano |
| Law of Superposition | The top rock layer and its fossils is the youngest, the bottom is the oldest. |
| Meteoroids | Chunks of rock or dust from space. |
| Meteorites | A piece of meteoroid that passed through the Earth's atmosphere and hit Earth's surface. |
| Comet | A small and icy object that orbits a star. |
| Asteroid | A small rock like object that orbits the sun. |
| Uniformism | The act of the same manner as present and over a long period of time. |
| Relative Age | The age of a rock compared to the ages of rock layers |
| Strata | Layers of rock. |
| Absolute Age | The true age of a rock of fossil. |
| Radiometric Dating | The use of radioactive isotopes as a measure for determining the age of a rock or fossil |
| Carbon Dating | A method that determines the age of an artifact |
| Geologic Time Scale | Timeline used to represent Earth's history |
| Half Life | The time it takes for half of the atoms of a radioactive element to decay |
| Isotope | Different number of neutrons |
| Convergent Boundries | A boundary between plates that are colliding. |
| Continental Crust | A thick part of the earth that form large landmasses mostly older oceanic crust. |
| Transform boundaries | When tectonic plates slide along beside each other. |
| Plate boundary | Where two tectonic plates meet. |
| Slab pull | The pulling of a tectonic plate as its edge subducts deep into the mantle |