Fossil Types and Fossil Formation

What type of fossil is an imprint in a rock?

• cast 

• trace 

• mold

• whole/part 

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NGSS.MS-LS4-1

Fossilized rock in the shape of dinosaur bones are which type of fossil?

• real bone

• mold fossil

• cast fossil

• trace fossil

This type of fossil forms when sediments bury an organism and then sediments change into rock; the organism decays leaving a cavity in the shape of the organism.

• mold

• cast

• petrified

• trace

Tags

NGSS.MS-LS4-1

This type of fossil forms when a mold is filled with sand or mud that hardens into the shape of the organism.

• mold

• cast

• trace

• preserved

Tags

NGSS.MS-LS4-1

What is the main difference between a cast fossil and a mold fossil?

• A cast fossil is a 3D impression of the organism, while a mold fossil contains the actual remains.

• A mold fossil is a hollow impression of the organism, while a cast fossil is created when the mold fills up.

• A cast fossil is made of amber, while a mold fossil is made of sediment.

• There is no difference; they are the same type of fossil.

Tags

DOK Level 2: Skill/Concept

This type of fossil forms when minerals soak into the buried remains, replacing the remains, and changing them into rock.

• mold

• cast

• petrified

• preserved

Shells and skeletons are typically fossilized in this fashion.

• mold and cast

• trace

• carbonized or carbon film

• permineralized or petrified

Tags

NGSS.MS-LS4-1

Trees and sometimes marine animals are sometimes fossilized this way

• permineralized or petrified

• trace

• carbonized or carbon film

• preserved or original remains

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What type of fossil is pictured? 

• mold

• cast

• trace fossil

• petrified fossil

Tags

NGSS.MS-LS4-1

What are the remains, imprints, or traces of once-living organisms?

• index fossils

• fossil

• mold

• cast

Tags

NGSS.MS-LS4-1