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What is a cast fossil?

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A cast fossil is a type of fossil that forms when minerals fill in the mold of an organism, creating a replica of the original organism.

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What is a mold fossil?

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A mold fossil is an impression left in sediment when an organism decays, leaving a cavity that can be filled with minerals.

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What is a trace fossil?

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A trace fossil is a type of fossil that records the activity of an organism, such as footprints, burrows, or feces.

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What is a body fossil?

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A body fossil is the actual remains of an organism, such as bones, teeth, or shells.

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NGSS.MS-LS4-1

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What is amber?

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Amber is fossilized tree sap that can trap and preserve organisms, often insects, within it.

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What replaces the wood in petrified wood?

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Minerals replace the wood of a once-living tree, turning it into petrified wood.

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What can scientists infer from finding a fish fossil in the desert?

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Scientists can infer that the area was once covered by water.

Tags

NGSS.MS-ESS2-2

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What is the difference between a mold and a cast fossil?

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A mold fossil is an impression of an organism, while a cast fossil is a replica formed when minerals fill the mold.

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What is the significance of trace fossils?

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Trace fossils provide insight into the behavior and activities of ancient organisms.

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How do fossils form?

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Fossils form through processes like sedimentation, mineralization, and preservation of remains.