Fossil – Any naturally preserved evidence of past life.
Mold – An impression of an organism formed when sediment hardens around the organism.
Cast – A fossil of organism formed when sediment fills a mold and hardens.
Fossil fuel – An energy rich resource formed from the buried remain of once-living organism.
A fossil can be –teeth-shell-Bones-footprints
The remain of Woolly mammoth have been found frozen in glaciers.
Small animals such as insect may become trapped in a flow of tree sap. (this is called amber)
Hard skeleton is buried in sediment change into rock.