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The process of selecting organisms with desired traits to be parents of the next generation

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A gap in the geologic record that shows where rock layers have been lost due to erosion.

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Fossils of widely distributed organisms that lived during a geologically short period.

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An igneous rock layer formed when magma hardens beneath Earth’s surface.

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An igneous rock layer formed when lava hardens on the surface of Earth.

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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.

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The age of a rock given as the number of years since the rock formed.

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The age of a rock compared to the ages of other rocks.

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A well-tested explanation for a wide range of observations or experimental results.

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A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.

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The process by which organisms that are best adapted to their environment are most likely to survive and reproduce.

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A genetically determined characteristics

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The study of heredity and the variation of inherited characteristics.

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Similar structures that related species have inherited from a common ancestor.

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Any difference between individuals of the same species.

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Physical features of an organism that help it to survive and succeed in its environment.

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The process by which an organism or a species changes its pattern of action to better suit its environment.

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Internal systematic responses to external stimuli in order to help an organism maintain homeostasis.

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A trait that increases an organism’s ability to survive and reproduce

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Change over time; the process by which modern organisms have descended from ancient organisms.

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A record of the geologic events and life forms in Earth’s history.

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Term used to refer to a group of related organisms that has died out and has no living members.

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A type of fossil that provides evidence of the activities of ancient organisms.

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A type of fossil consisting of an extremely thin coating of carbon on rock.

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A fossil in which minerals replace all or part of an organism.

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A fossil that is a solid copy of an organism’s shape, formed when minerals seep into a mold.

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A type of fossil that is hollow area in sediment in the shape of an organism or part of an organism.

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Fossil Record- The fossils in a particular group of rocks that give information about how and when those rocks formed.

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The preserved remains or traces of an organism that lived in the past