Evolution-fossils

Created by Smoochie__Wallace 

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fossil

the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil

petrification

gradual change of the original substances of an organism dissolve and are replaced by minerals from the water (turned to stone)

Mold

a fossil formed when an organism buried in sediment dissolves, leaving a hollow area

cast
cast

the type of fossil that forms when a mold becomes filled in with minerals that harden. the cast takes on the shape of the mold creating a replica of the organism or part.

amber

a hard yellowish to brownish translucent fossil resin

imprints

Thin object falls into sediment can leave an imprint when sediment hardens.

tar pit

large pools in Southern California that contain fossil remains of many different animals

trace fossil

a type of fossil that provides evidence of the activities of ancient organisms

evolved

to develop gradually by process of growth and change

bipedal

term used to refer to two-footed locomotion

geographic time scale

categories of time into which Earth's history is divided by geologists and paleontologists: eons, eras, periods, epochs

radiometric dating

the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products

uranium

a white, radioactive metallic chemical element that weighs more than any other element in nature.

lead

led, led

tetrapod

a vertebrate animal having four feet or legs or leglike appendages

palentologist

A scientist who studies fossils

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