Fossils

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What is a fossil?

Back

The hardened remains or traces of a living thing that died long ago.

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What is a mold fossil?

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A space in rock in the shape of a living thing, leaving a hollow space.

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What is a trace fossil?

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A fossil that shows evidence of the activity of a living thing, such as footprints.

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What is a body fossil?

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The actual remains of an organism, such as bones or shells.

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What is a cast fossil?

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A fossil that forms when a mold is filled with minerals or sediment.

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What must happen to an organism for it to become a fossil?

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It must usually be buried quickly after it dies.

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What does extinct mean?

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A species that no longer exists.

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What does endangered mean?

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A species that is at risk of becoming extinct.

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What are minerals?

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Natural substances that make up rocks and can replace organic material in fossils.

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What is the oldest fossil?

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The fossil that is found in the deepest layers of rock.