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Earth Science Unit 1
Vocab from unit 1
Question | Answer |
---|---|
Ages | Smaller divisions of an epoch in geologic time |
Amber | Fossilized tree sap that may contain the actual remains of ancient life |
Astronomy | Study of our solar system and the objects in it |
Casts | Type of fossil in which material is deposited in a space created by a dead animal or plant |
Cenozoic | Most recent era on Earth in the geologic time scale |
Cross-Cutting Relationship | The principle that an intrusion or fault is younger than the rock it cuts across |
Ecology | Study of the interactions between the living things on Earth and their nonliving resources in their environments |
Environmental Science | Study of the effects people have on their environments and Earth's resources |
Eons | The largest division of time on the geological scale; includes Phanerozoic, Proterozoic, and Achaean |
Epochs | Divisions within geologic periods; the smallest units of geologic time |
Eras | Divisions within the various eons and often tied to mass extinctions or major events; divided into periods, such as Paleozoic, Mesozoic, or Cenozoic |
Extinct | A term that typically describes a species that no longer has any known living individuals. |
Fossils | Preserved remains of plants and animals |
Freezing | Preservation of ancient animals and plants in areas were temperatures were below freezing for extended periods of time |
Geologic time scale | Used to explain the history of the Earth based on rock and fossil evidence |
Geology | Study of solid earth including rocks, minerals, and Earth's resources |
Glaciology | The scientific study of the nature, formation, and movement of glaciers |
Holocene | Most recent epoch on Earth in the geologic time scale |
Hydrology | Study of underground water found between soil and rock particles |
Igneous | Type of rock formed when lava or magma cools and hardens |
Impression | Type of fossil in which imprints are preserved, such as footprints in a river bed |
Index fossils | Distinctive fossils used to establish and compare the relative ages of rock layers and the fossils they contain |
Key beds | A n easily identified strata (layer) that is distinctive enough to be useful in correlation in matching rock from different areas/regions |
Lateral Continuity | Principle that states that an original sedimentary layer extends laterally until it tapers or thins at its edges. |
Limnology | Study of rivers and lakes |
Marine biology | Study of living things in the ocean |
Meteorology | Study of Earth's atmosphere and weather |
Mineralogy | Study of minerals and their properties |
Molds | An open area left behind after a plant or animal remains are gone that is filled in with deposits to form cast fossils |
Oceanography | Study of the oceans |
Original Horizontality | Principle stating that sedimentary rocks are deposited in horizontal or nearly horizontal layers. |
Paleontology | Study of fossils and how ancient organisms lived |
Periods | Divisions in a specific era, such as Quaternary, Jurassic, and Cambrian |
Petrification | The process by which organic material is turned into stone or fossils; cells are replaced with minerals |
Phanerozoic | Most recent eon on Earth in the geologic time scale |
Quaternary | Most recent period on Earth in the geologic time scale |
Relative age | The age of a specific rock in comparison with other rocks; i.e. older or younger than surrounding rock |
Rocks | Provides clues about Earth's past; classified as igneous, sedimentary, and metamorphic |
Sedimentary | Type of rock in which most rocks form |
Seismology | Study of earthquakes |
Selenology | Study of the moon and its geology |
Stratigraphy | The study of rock layers and the sequence of events they reflect |
Superposition | A principle that states that younger rocks lie above older rocks if the layers have not been disturbed |
Tar Pit | Area composed of a petroleum |
Trilobite | A marine arthropod, now extinct, that lived during the Paleozoic era |
Unconformity | Refers to a gap in the sequence of rock |
Uniformitarianism | A principle that geologic processes that occurred in the past can be explained by current geologic processes |
Volcanology | Study of volcanoes |