Fossils are the remains of ____ organisms preserved in rock from ____ of years ago. Fossils form when a dead organism is covered in ____ or sand before it can begin to decay normally. The remains are squashed under layers of ____, eventually, over millions of years the ____ are replaced by minerals. Making a copy of the organism out of rock. Normally only the ____ or bony parts of an organism are made into ____. It is rare for skin, feathers or scales/muscles to be turned into fossils.

Fossils

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