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fossil record words

vocabulary words

words 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 fossil body parts of organisms that become fossils , such as bones , teeth , skin , leaves , tree trinks
cast cast are formed when sediment leakes into a mold and hardens to form a copy of the original structure
compression fossil formed when an organism is flattened { compressed } , 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 { and any fossils they contain } caused by wind, sun, and / or water
fossil the natural remains of traces of past life . something is considered to be a fossil if it is at least 10,000 years old
fossil record all of the fossils that have existed throughout life's history , whether they have been found or not
groundwater water found underground as a result of rainfall , ice and snow malet , submerged rivers , lakes ,and springs
ichnology the study of trace fossils
igneous rock type of rock produced when molten magma { lava } cools and solidifies
inorganic not containing carbon not from living things. ex , mineral
impression fossilized prints or marks made by a living thing. leaf prints , skin prints and footprints are good examples
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 , pressure , and chemical activity in the earth
mineralization 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 the past
paleontologists are 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 other geologic processes of the earth's surface
rock cycle the process through which one type of rock { igneous , sedimentary , or metamorphic } is converted into another
scavenger an organism that feeds on dead and dying organisms
sedimentary rock rock that formed when layers of small particles { sediment } are compressed and cemented together
trace fossil evidence left by organisms such as burrows, imprints , coprolites , or footprints
uplift the process that causes part of the earths crust to rise above surrounding areas this can cause layers of rock to become exposed at the surface
relative age its age compared to the ages of other rocks
absolute age of a rock is that number of years since the rock formed
law of superposition to determine the relative ages of sedimentary rock layers
extrusion lava that hardens on the surface
intrusion there the magma cools and hardens into a mass of igneous rock
fault is a break in earths crust
unconformity the surface where new rock layers meet a much older rock surface beneath them
inclusion is a piece of rock that contained in another rock
index fossil part 1 a fossil must be widely distributed and represent a type of organism that existed only briefly
index fossil part 2 are useful because they tell the relative ages out of the rock layers in which they occur
determine relative age geologists also study extrusion and intrusions of igneous rock fault gaps in the geologic record and inclsion
extrusion at surface youngest
intrusion below surface = younger than bottom surface
Created by: eva1017
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