Crust
Terms
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- The outermost and thinnest layer of earth
- Crust
- the layer of rock between the Earths crust and its core
- Mantle
- The center of planetary body such as Earth
- Core
- the thin outer shell of earth consisting of the crust and rigid upper mantle
- lithosphere
- The theory that Earths surface is made up of large moving plates
- Plate tectonics
- The zone of the mantle beneath the lithosphere that consists of slowly flowing solid rock
- asthenosphere
- Molten rock within the Earth
- Magma
- the process in which a tectonic plate dives beaneath another tectonic plate and into the asthenosphere
- subduction
- A crack in the Earth, created when rocks on either side of a break move
- Fault
- The area along a fault at which slippage first occurs, initiating an Earthquake.
- Focus
- The point on Earths surface directly above the focus of an Earthquake.
- epicenter
- Primary waves; the longitudinal waves generated by an earthquake.
- P waves
- secondary waves; the tranverse waves generated by an earthquake
- S waves
- A seismic wave that travels along earth surface
- Seismology
- Scale that expresses that relative magnitude of an earthquake
- Richter Scale
- An opening through whcih molten rock flows onto Earths surface
- Vent
- A natural inorganic solid with a definite chemical composition and a characteristic internal structure
- Mineral
- rock formed from cooled and hardened magma or lava
- igneous rock
- Change in the physical form or chemical composition of rock materials exposed at Earths surface
- Weathering
- Rock formed from compressed or cemented deposits of sediment
- Sedimentary
- The traces or remains of a plant or an animal found in sedmentary rock
- fossils
- Rock formed from other rocks as a result of heat, pressure, or chemical processes.
- Metamorphic Rock
- Precipitation that has an unusually high concentration of sullfuric or nitric acids resulting from chemical pollution of the air
- Acid Rian
- The process by which rock and or the products of weathering are removed
- Erosion
- Process in which sediment is laid down
- deposition