Evolution
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| species | a group of similar organisms whose members can mate with one another and produce fertile offspring
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| evolution | the gradual change in a species over time
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| natural selection | the process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species
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| adaptation | a characteristic that helps an organism survive in its environment or reproduce
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| scientific theory | a well-tested concept that explains a wide range of observations
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| variation | any difference between individuals of the same species
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| fossil | the preserved remains or traces of an organism that lived in the past
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| sedimentary rock | a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
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| relative dating | a technique used to determine which of two fossils is older
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| absolute dating | a technique used to determine the actual age of fossils
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| half-life | the time it takes for half of the atoms of a radioactive element to decay
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| fossil record | the millions of fossils that scientists have collected
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| extinct | a species that does not have any living members
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| gradualism | the theory that evolution occurs slowly but steadily
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| punctuated equilibria | the theory that species evolve over short periods of rapid change
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| homologous structure | body parts that are structurally similar in related species; provide evidence that the structures were inherited from a common ancestor
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| branching tree | a diagram that shows how scientists think different groups of organisms are related
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Created by:
skrebbeks
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