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Fossils flashcards

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QuestionAnswer
species group of similar organisms that can mate with each other and produce fertile offspring
Adaptation a genetic trait that helps an organism survive and reproduce
Evolution change in a species over time
Natural Selection 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
How a new species forms when a group of individuals remainds separated from the rest of its species long enough to accumulate different traits
How fossils form most form when organisms become buried under sediments after they die
Petrified fossils fossils that form after remains are buried in sediment
Mold a hollow space in a sediment in the shape of an organism or part of an organism is called a mold
Relative Dating used to determine which of two fossils is older
Absolute Dating used to determine the actual age of a fossil
Variation difference between individuals of the same species
Selection concept that some variations make individuals better adapted to their environment
Overproduction Producing far more offspring than can possibly survive
Radioactive Dating Dating that finds the age of the rocks surrounding the fossils to find the age of the fossils
Half-life the time it takes for half of the atoms in a sample of radioactive elements to decay
fossil record the millions of fossils that scientists have collected
extinct when no members of that species are still alive
gradualism idea that proposed that evolution occurs slowly but steadily
punctual equilibria the idea that states that species change a lot during short periods of time, then have a long period of little or no change
causes of extinction Natural events, and human activities
Branching Tree diagram that shows how scientists think different groups of organisms are related
Created by: namantra
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