Learning Goal : 

How does something become a fossil?

Live.Die.Get Buried

Well, it is not as Simple as it sounds. Most Plants  and animals decay very quick or get eaten after dying. Before becoming a fossil, it has to be buried rapidly and repeatedly by sediment ( like mud). There is body fossils, includes any part of the actual  animals or plants, such as bones, shells and leaves. there is also trace fossils, which provides evidences of the activities of ancients animals-something body fossil can't do. One single animal can make countless of trace in it lifetime, but only leaves one body behind when dies.