#070 Flashcardizz Review for Evolutionary History Unit Test

Front

What is the fossil record?

Back

The fossil record is the history of life on Earth as documented by fossils, which are the preserved remains or traces of organisms from the past.

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What are index fossils?

Back

Index fossils are fossils of species that existed for a short period but were widespread, used to date the layers of rock in which they are found.

Front

Which layer of sedimentary rock contains the youngest fossils?

Back

The youngest fossils are typically found in the topmost layer of sedimentary rock.

Front

True or False: All fossils come from dinosaurs.

Back

FALSE. Fossils can come from a variety of organisms, including plants, fish, and mammals.

Front

What does it mean if Layer B is older than Layer C?

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It means that Layer B was deposited before Layer C, indicating a sequence of geological time.

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What is a trace fossil?

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A trace fossil is a type of fossil that provides evidence of the activity of ancient organisms, such as footprints or burrows.

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How do scientists use the fossil record?

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Scientists study the fossil record to learn about the history of life, past environments, and how different groups of organisms have changed over time.

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What is the significance of sedimentary rock layers?

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Sedimentary rock layers provide a chronological record of Earth's history, with the oldest layers at the bottom and the youngest at the top.

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What is the principle of superposition?

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The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

What are original remains in the context of fossils?

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Original remains are the actual preserved parts of an organism, such as bones, teeth, or shells.