Unit 5, Topic 1: The History of Planet Earth Vocabulary

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evidence

Back

observations that support an explanation

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reasoning

Back

explains how evidence supports a claim

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organism

Back

living thing

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sedimentary rock

Back

a type of rock formed by gravity pressing fragments of other rocks and minerals together

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fossil

Back

remains of a plant or animal preserved in Earth's crust

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carbonization

Back

a process in which organic material in an organism is converted into carbon

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cast

Back

a copy of the mold that is made by filling it with minerals or other materials

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mold

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an impression of an organism that is left in the ground

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petrification

Back

a process in which the organic material in an organism is replaced by minerals

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trace fossil

Back

fossil evidence of the activities of organisms