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| Fossils and Ancient Environment 8.11 |
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Definition
| ______ can give information about environment, climate, animal behavior, and dating rocks. |
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| ______ allows you to date the time of death because when an organism dies, it slowly begins to lose the carbon in its body. |
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What are 2 sources of error with radiometric dating
8.11 |
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Definition
-could be wrong if the parent and daughter particles are altered
- the has been metamorphosed |
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Definition
| ______ are remains or ttraces of a once-living organism preserved in rock. |
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Definition
| ______ are fossils that form when some or all of the original materials that made up the organisms are replaced with minerals. |
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Definition
| ______ are fossils formed when the remain of a once-living organism are subjected to heat and pressure, leaving only a this film of carbon behind. |
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Definition
| A ______ is a fossil formed when an organism is buried, decays, and leaves behind a hollow place in the rock. |
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Definition
| A ______ is a fossil formed when sediments fills a mold and hardens into rock. |
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| A ______ is a fossils of species that existed on Earth for only a short time, were abundant, and were widespread geographically, they are used by scientists to determine the age of rock layers |
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Term
| principle of superposition 8.11 |
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Definition
| The ______ states that for undisturbed layers of rocks, older rocks ie underneath younger and younger rocks. |
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Definition
| ______ is a method to determine the order of events and relative age of the rocks by examining the position of rocks in a sequence. |
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Definition
| ______ are gaps in the rock layers due to erosion, nondeposition, or both. |
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Definition
| ______ is the process that uses the properites of atoms in rocks and other objects to determine their exact ages, in years. |
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Definition
| ______ is the release of nuclear particles and energy fro unstable atomic nuclei. |
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Definition
| ______ if the time needed for one-half the mass of a sample of a radioactive isotope to decay, it can vary from fractions of a second to billions of years. |
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Definition
| ______ is the process to determine the absolute ages of rocks by measuring the amounts of parent and daughter materials in a rock by knowing the half-life of the parent. |
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Definition
| ______ statesthat Earth processes happening today are similar to those that happened in the past. |
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