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Page 3 ES Vocabulary
Page 3 Vocabulary
| Question | Answer |
|---|---|
| relative age dating | places events in sequence without assigning an exact numerical age. Says Rock A is older than Rock B |
| absolute age dating | Places a numerical age to an event. This Cheseapeake Bay Bolide hit earth 60 million years ago is an example of this type of dating process |
| half-life | time it takes half of a radioactive material to turn non-radioactive. helpts to determine an absolute age of things |
| fossil | remains, impressions or other evidence of a former existance of life |
| marine | Virginia fossils are of this type of organism |
| era | 4 of these large units of geologic time makes up earth history. The precambrian, paleozoic, mesozoic and cenozoic are all geologic ______ |
| period | A subdivision of an Era. Triassic, Jurassic and Cretacious are all these of the Mesozoic Era |
| PreCambrian Era | The longes Era of Earth History. occupies almost 90% of earth History. The ange of single celled life. |
| Mesozoic Era | Age of the dinosaurs. ended with an large impact from a comet or asteroid |
| Paleozoic Era | Age of the fish or marine life. A great dying or extinction marked the end of the era |
| Cenozoic | Age of the mammals and humans. the current geologic era. |
| seamount | an underwater volcanic mountain |
| abyssal plain | smoothflat horizontal ocean floor with thick sediments |
| delta | sediments deposited at the mouth of a river as the river slows in velocity |
| meander | twisted loops and turns in a mature river |
| glacial | relating to the ice ages or advance of ice during earth history. slow moving |
| soil profile | soil layers from the surface to the solid rock layere undeerneath |
| A horizon | rock sediments mixed with organic material; also called topsoil |
| humus | the dark organic material found in the A horizon or topsoils |
| B Horizon | rock sediments with out humus. made of clay usuall tan/red or light brown |
| C horizon | slightly weathered parent rock |
| Bedrock | unweathered rock layer below the soil |
| water table | top of the zone of saturation |
| cone of depression | the lowering fo the water table due to pulling water from a well faster than it can be replaced. |
| Physical (mechanical) weathering | disntegration of rock material. Rock is split into smaller pieces. No change in composition |
| Chemical weathering | decomposition. minerals of rocks are changed into different substances. |
| mature soil | soil with a very thick A- horizon |
| salintiy | the amount of dissolved materials found in ocean water |
| focus | point in the earth where movement occurs along a fault. |
| epicenter | point on the earth's surface directly above the focus of an earthquake |
| 32x | each whole number increase of earthquake strength means it is ______ times stronger. A magnitude 6 earthquake is ___ times stronger than a magnitude 5 earthquake |
| P- waves | fastest moving earthquake waves tht can travel thru solids and liquids |
| S- waves | slower moving earthquake waves that cannot pass through a liquid |
| Inner core | layer of the earth that is very hot and SOLID due to the extreme pressure and gravity. made of iron and nickle |
| Outter Core | The area of the core that is liquid. S-waves from earthquakes do not pass thru this layer. |
| mantle | area of the earth where convection occurs to push the plates |
| land breeze | hot land heats the air during the day creating rising air. Cooler air moves from the water toward the land creating this breeze |
| Big Bang | The Scientific theory that states that the universe began in a very hot, dense state that expanded and eventuallycondensed into galaxies. |
| CFC | The man-made gas that when released into the atmopshere willdestroy ozone creating the Ozone Hole |
Created by:
david_kielbowick
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