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Earth's History

Abiotic/Physical factors non-living factors such as erosion,wind and sun exposure.
benthic living at the bottom of the ocean of on the ocean floor
biological/biotic factors body fossils
cast casts are formed when sediment leaks into a mold and hardens to form a copy of the original structrue
compression fossils formed when an organism is 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 or traces of past life something considered to be a fossil id 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 melt, submerged rivers, lakes, and sprngs
ichnology the study of trace fossils
igneous rock 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, 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 on 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 past life
paleontologists people who study fossils to learn about past life
plate tectonics the concept that explains the movements of the earths crustal plates, sea floor spreading, and a number of other goelogical processes of the earths surface
rock cycle the process through which type of rock( igneous, sedimentary, or metamorphic) is converted one into another
scavenger an organism that feeds on dead and dying organisms
sedimentary rock rock that formed when layers of small particles compress and cement together
trace fossil evidence left by organisms such as burrows, imprints, coporlites, 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 be exposed
relative age rock compared to the age of other rock
absolute age number of years since the rock formed
law of superposition used to determine sedimentary rock layers
extrusion lava that hardens on the surface
intrusion magma that hardens in large pockets beneath the surface
fault break in earths crust
unconformity a gap in the geological record
index fossils fossils used to help date rocks around it
inclusion a piece of rock that is contained in another rock
geology the study of of the structure of the planet
uniformitarianism states that the geological processes happening now happened in the past
magma molten material beneath earths surface
lava molten material on earths surface
atom what all matter is made of
element when all the atoms in a particular type of matter are the same
radioactive decay when unstable elements break down into stable elements
half-life how long it takes for half of the radioactive atoms to decay
geological time scale a record of the life forms and geological events in history
era the three long units between precambrian time and the present
periods sub-divided eras
invertebrates animals without backbones
vertebrate animals with backbones
amphibian an animal that lives part of its life in water and part of its life on land
reptiles cold-blooded animals with scaly skin that lay eggs with tough, leathery shells
mass extinction when many types of living things die out at the same time
mammal warm blooded vertebrate that feeds its young milk
Created by: blundy616956