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Standard 5 Vocab

Standard 5 Vocabulary Words

TermDefinition
Speciation The formation of new species as a result of evolution.
Evolution The gradual change in a species over time.
Relative dating Any method of determining whether an event or object is older or younger than other events or objects.
Hominid Type of primate characterized by bipedalism, relatively longer lower limbs, and lack of a tail; ex. humans and their ancestors.
Sedimentary rock Types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water.
Primate Type of mammal characterized by opposable thumbs and binocular vision.
Homo sapiens The species of hominids that included modern humans and their closest ancestors, and that first appeared about 100,000 to 150,000 years ago.
Cenozoic Era The current geological era, which began 65.5 million years ago; also called the Age of Mammals.
Geologic Time Scale The standard method used to divide the Earth's long natural history into manageable parts.
Adaptation A behavior or physical characteristic that allows an organism to survive or reproduce in its environment.
Precambrian Time The interval of time in the geologic time scale from Earth's formation to the beginning of the Paleozoic era, from 4.6 billion to 542 million years ago.
Mesozoic Era The geologic era that lasted from 251 million to 65.5 million years ago; also known as the Age of Reptiles.
Paleozoic Era The geologic era that followed the Precambrian Time and that lasted from 542 million to 251 million years ago.
Species A group of organisms that are closely related and can breed together.
Natural selection A process by which individuals that are better adapted to their environment are more likely to survive and reproduce than others of the same species.
Paleontologist A scientist that studies fossils.
Fossil record A historical sequence of life indicated by fossils found in layers of the Earth's crust.
Selective breeding The human practice of breeding animals or plants that have certain desired traits.
Fossil The trace or remains of an organism that lived long agao, most commonly preserved in sedimentary rock.
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