Carousel Earth History 8.E.2.1 and 8.E.2.2

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What is a cast fossil?

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A cast fossil is formed when sand or mud hardens in the shape of an organism, creating a replica of the original organism.

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What is the role of index fossils in dating rocks?

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Index fossils are used to determine the approximate age of rock layers by comparing them to known ages of fossils.

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Who studies fossils?

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Paleontologists are scientists who study fossils to understand past life forms and their environments.

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Which rock layer contains the most recently evolved organisms?

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The topmost rock layer typically contains fossils of the most recently evolved organisms.

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What is metamorphic rock?

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Metamorphic rock is formed from existing rock that has changed due to heat, pressure, or chemical reactions.

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What is a mold fossil?

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A mold fossil is an impression left in sediment that reflects the shape of an organism.

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What is the difference between igneous and sedimentary rock?

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Igneous rock is formed from cooled magma or lava, while sedimentary rock is formed from the accumulation of sediment.

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What are fossils?

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Fossils are the preserved remains or traces of ancient organisms, often found in sedimentary rock.

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What is the significance of studying fossils?

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Studying fossils helps scientists understand the history of life on Earth and how organisms have evolved over time.

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What is the process of fossilization?

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Fossilization is the process by which organic material is preserved in sediment, often through mineralization.