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Quarter 4 Science Vocabulary
Terms in this set (20)
Preserved remains of once-living organisms
The age of a rock compared to the ages of rock layers
Determining the age of a fossil based on how much the rock has radioactively decayed
geologic time scale
A record of the geologic events and life forms in Earth's history.
A term that typically describes a species that no longer has any known living individuals.
A hard yellowish to brownish translucent fossil resin
length of time required for half of the radioactive atoms in a sample to decay
The breakdown of a radioactive element, releasing particles and energy
the numeric age of an object or event, often stated in years before the present, as established by an absolute-dating process, such as radiometric dating
Law of Superposition
The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.
Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
a scientific method used to determine the age of an artifact
An igneous rock layer formed when magma hardens beneath Earth's surface.
English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
The scientific study of heredity
Breeding organisms with specific traits in order to produce offspring with identical traits.
A characteristic that is passed from parent to offspring.
traits with a particular quality.
the study of fossils
The bodily structure of an organism or of any of its parts
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