Fossils are the ____ or imprints left by plants and ____ that lived ____ of years ago. The ____ may look the same as when the plant and animal was alive but have now changed to ____ . They become buried under layers of ____ which then wears away so they can be ____ again. ____ can be found ____ . A buried ____ is not a fossil. To become a fossil, the bone has to become ____.

Fossil or Bone?

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