Which layer is the oldest?

A dinosaur's preserved footprints are an example of a

Eras can be broken down into shorter periods of time called

Fossils that are preserved in amber, ice or tar pits are

Relative dating is determined by

Evolution means

Which is the correct order of a fossil being made?

Intrusions and extrusions are always ________________ than the layers they go through.

Half-life is used in determing the

Pangaea is the theory that

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