Fossils

Fossils are dead animals or plants.They are usually skeletons found embedded in rock.Sometimes fossils are footprints or poop.Small animals or insects get stuck in tree sap which hardens and traps them forever.Large animals can get trapped in ice, or their carcass gets trapped in layers of rock.Over One Thousand of years, pressure builds up.Next the mould left is filled with minerals that form rock.The rock shape is the fossil-an exact replica of the dinosaur.This process takes Ten Thousand years.Palaeontologist find fossils when the top layer of dirt or rock washes away.