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Ch13 Earth and Space
Definitions from Earth and Space Science BJU Press Ch 13
| Term | Definition |
|---|---|
| geology | study of earths structure |
| crust | earths outer layer |
| discontinuity | boundary between two layers of the eart |
| Moho | boundary between crust and mantle |
| seismologist | earthquake scientist |
| mantle | occupies 84% of earths volume |
| lithosphere | combination of upper mantle and crust |
| asthenosphere | layer where earthquakes slow down |
| core | contains 15-16 % of earths volume |
| sediment | loose material that sinks to bottom of water |
| strata | sedimantary rocks under the earths crust |
| radioactive | atoms are unstable |
| carbon-14 | element carbon |
| LSC | tests |
| AMS | tests |
| calibration | graph of carbon 14 |
| anomalous sample | tests |
| dendrochronology | |
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| uranium-lead method | radioactive uranium |
| potassium-argon method | uses elements |