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Earth's History
| Term | Definition |
|---|---|
| Abiotic/Physical Factors | Non-living factors such as erosion, wind and sun exposure. |
| Benthic | Living at the bottom of the ocean or on the ocean floor. |
| Biological/Biotic Factors | Living factors such as decomposers, scavengers, and predators |
| Body Fossils | Body parts of organism that become fossils, such as bones, teeth, skin, leaves, tree trunks |
| Cast | Casts are formed when the sediment leaks into a mold and hardens to form a copy of the original structure. |
| Compression | Fossils formed when an organism is flattened, leaving a dark stain in the rock. |
| Coprolite | Fossilized feces |
| Decomposer | An organism that breaks down the tissue and/or structures of dead organisms |
| Erosion | Weathering or wearing away of rock and earth. |
| Fossil Record | ALL of the fossils that have existed throughout life's history, whether they have been found or not. |
| Fossil | The natural remains or traces of past life. |
| Groundwater | water found underground as a result of rainfall, ice, and snow melt, submerged rivers, lakes and springs |
| Ichnology | The study of trace fossils |
| Igneous Rock | The type of rock produced when molten magma cools and solidifies |
| Inorganic | Not containing carbon. Not from living things |
| Impression | Fossilized prints or marks made by a living thing |
| Intertidal | The coastal zone between the low and high tide mark where waves impact the land |
| Metamorphic Rock | Rock produced when any type of rock is changed by heat. |
| Mineralized | The process whereby living material is replaced with minerals |
| Mold | The impression of an organism left behind in the rock |
| Paleontology | The study of life in past history |
| Paleontologists | People who study fossils and other types of evidence to learn about life in the past |
| Plate tectonics | The concept that explains the movement of the Earth's crustal plates, sea floor, spreading, and a number of others geological processes of the Earth's sufaces |
| Rock cycle | the process through which one type of rock is converted to another |
| Scavenger | An organism that feeds on dead and dying oranisms |
| Sedimentary Rock | Rock that is formed when layers of small particles are compressed |
| Trace fossil | evidence left by organism such as burrows, imprints, coprolites, or footprints |
| Uplift | the process that causes part of the Earth's crust to rise above surrounding areas. This can cause layers of rock to become at the surface |
| Relative age | age compared to the age of other rocks |
| Absolute age | the number of years since the rock formed |
| Law of superposition | Law used to determine the relative ages of sedimentary rocks |
| Extrusion | Lava that hardens of surface |
| Intrusion | when magma cools and hardens into mass of Igneous rock |
| Fault | break in Earth's Crust |
| Unconformity | new rock layers meet |
| Inclusion | Piece of rock that is continued in another rock |
| Index fossil | certain fossils |
| Atoms | tiny particles |
| element | any substance that cannot be broken down |
| radioactive decay | process in which releases particles |
| halflife | time it takes for half of the atoms to decay |
Created by:
brauliocc5
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