Fossils

Any part or trace of a living organism that is naturally preserved after it dies is called a _____.

• rock

• fossil

• mineral

• paleontologist

The softest parts of an organism usually _____, or rot away, first.

• evolve

• preserve

• petrify

• decompose

When an animal's bone or a piece of wood decays, it can be replaced by minerals that harden over time. This forms a _____.

• petrified fossil

• trace fossil

• rock

• true form fossil

A _____ is created when an organism decomposes after the fine sediment covering it hardens. It leaves an empty space in the rock.

• trace fossil

• cast

• mold

• carbon print

If fine sediment fills in the empty space of a mold, a ______ is formed. It is a copy of the shape of the organism.

• carbon print

• cast

• trace fossil

• petrified fossil

A fossil formed when parts of a plant or animal turn to carbon forming a dark image of itself in rock is called a ______.

• mold

• petrified fossil

• trace fossil

• carbon film

______ formed from something that an organism left behind such as a footprint, a hole where the animal lived, or droppings.

• petrified fossils

• trace fossils

• true form fossils

• carbon films

_____ is sap from a plant buried during the Flood that has hardened into a yellow, gem-like substance.

• amber

• tar

• permafrost

• amethyst

______ is permanently frozen soil.

• tar

• amber

• permafrost

• ice

In some places, thick crude oil oozes out of the earth and forms _____ pits which can trap and preserve animals.

• oil

• tar

• ice

• amber