Fossils

Front

Fossils must be at least ___________ years old.

Back

10,000 years old

Front

A(n) ____ is a type of fossil that occurs when minerals fill the empty space of the mold to produce a copy of the original organism.

Back

cast

Front

A(n) ___ is a type of fossil that forms when a thin object leaves an impression in the soft mud which later hardens.

Back

Imprint

Front

____ occurs when minerals slowly replace the original substances in the organism and turn it to stone.

Back

Petrification

Front

___ fossils are only the marks or evidence of the activities of an organism.

Back

Trace

Front

Preservation of an entire organism in amber, by freezing, or in tar pits is very rare.

Back

True

Front

The principle of _____ states that fossil organisms succeed (come after) one another in a definite and determinable order, and therefore any time period can be recognized by its fossil content.

Back

Fossil Succession

Front

TRUE or FALSE: Dinosaurs are an excellent example of an index fossil.

Back

False

Front

A(n) _____ is a fossil that lived in a particular geologic age and is used to identify or date the rock or rock layer in which it is found.

Back

Index Fossil

Front

A fossil is the remains or evidence of a living thing.

Back

True