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Stack #4643302
| Question | Answer |
|---|---|
| uniformitarianism | a geologic scientific theory |
| fossil | the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers |
| trace fossil | geological records of the activities and behaviors of past life |
| climate | The long-term pattern of temperature, precipitation, and weather conditions in a particular region. |
| ice core | A cylindrical sample drilled from ice sheets or glaciers, used to study past climate, atmospheric gases, and temperature changes over thousands of years. |
| relative dating | Determining the age of a rock or fossil compared to other nearby rocks or fossils, without providing a numerical age. |
| superposition | The principle that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. |
| unconformity | A gap in the geological record where rock layers were eroded or not deposited for a period of time. |
| geologic column | n idealized sequence of rock layers showing Earth's history, used as a reference for dating rocks and fossils. |
| absolute dating | Determining the numerical age of a rock, fossil, or sediment using techniques like radioactive decay. |
| radioactive decay | he processes by which an unstable radioactive isotope loses particles and energy, transforming into a more stable isotope over time. |
| half-life | the time required for half of the atoms of a radioactive isotope to decay into a stable form. |
| radiometric dating | A method of determining absolute age using the known decay rates of radioactive isotopes in rocks or fossils. |