Fossils

cast

A solid copy of the shape of an organism; made by filling in a mold with minerals that later turn to rock.

trace fossil

A type of fossil that provides evidence of the activities of ancient organisms

mold

A hollow area in sediment in the shape of an organism or part of an organism; formed when the organism makes an indentation that turns to rock over time

Peserved remains

Forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or amber

carbon film

an extremely thin coating of carbon on rock. ; made when an organism is squeezed by rock until only carbon remains. Two Deminsonial= Very good in detail

fossil record

The complete body of fossils that shows how species and ecosystems change over time. Like a timeline of fossils to show how a species changes over time.

Fossils

Preserved remains or traces of living things Most fossils form when living things die and are buried by sediment; over time the sediments harden Fossils are only found in sedimentary rock.

frozen remains

When an organism becomes trapped in some way, the temperature drops rapidly and then froze

Petrified fossil (permineralized fossil)

forms when minerals soak into the buried remains, replacing the remains, and changing them into rock