Standard 5 Vocabulary Words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Speciation | The formation of new species as a result of evolution.
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| Evolution | The gradual change in a species over time.
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| Relative dating | Any method of determining whether an event or object is older or younger than other events or objects.
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| Hominid | Type of primate characterized by bipedalism, relatively longer lower limbs, and lack of a tail; ex. humans and their ancestors.
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| Sedimentary rock | Types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water.
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| Primate | Type of mammal characterized by opposable thumbs and binocular vision.
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| 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.
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| Cenozoic Era | The current geological era, which began 65.5 million years ago; also called the Age of Mammals.
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| Geologic Time Scale | The standard method used to divide the Earth's long natural history into manageable parts.
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| Adaptation | A behavior or physical characteristic that allows an organism to survive or reproduce in its environment.
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| 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.
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| Mesozoic Era | The geologic era that lasted from 251 million to 65.5 million years ago; also known as the Age of Reptiles.
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| Paleozoic Era | The geologic era that followed the Precambrian Time and that lasted from 542 million to 251 million years ago.
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| Species | A group of organisms that are closely related and can breed together.
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| 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.
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| Paleontologist | A scientist that studies fossils.
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| Fossil record | A historical sequence of life indicated by fossils found in layers of the Earth's crust.
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| Selective breeding | The human practice of breeding animals or plants that have certain desired traits.
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| Fossil | The trace or remains of an organism that lived long agao, most commonly preserved in sedimentary rock.
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