Types of Fossils/Index Fossils

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

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

• mold
• cast
• petrified
• preserved

Tags

NGSS.3-LS4-1

NGSS.4-ESS1-1

Remains of animals can be preserved by preventing them from decaying. What substances might help preserve parts or a whole animal

• tar, amber, ice
• ice, carbonization, trace
• rock, amber, ice
• tar, carbonization, rock

Tags

NGSS.2-PS1-1

These fossils are distinguishable from other fossils because they were scattered over a large region, very common, and lived during a short span of geologic time

• trace
• index
• permineralized
• mold and cast

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS1-4

What type of fossil is pictured? 

• cast
• petrified fossil
• preserved remains
• trace 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

This type of fossil forms when organisms or parts, like leaves, stems, flowers, fish, are pressed between layers of soft mud or clay that hardens squeezing almost all the decaying organism away leaving the carbon imprint in the rock.

• trace
• preserved or original remains
• carbonized or carbon film
• permineralized or petrified

Tags

NGSS.MS-LS4-1

A woolly mammoth or ancient hominid might be found in frozen tundra such as the arctic circle. This type of fossil would be

• preserved or original remains
• permineralized or petrified
• carbonized or carbon film
• trace

Tags

NGSS.MS-LS4-1

What kind of age does index fossils help show?

• absolute age

• carbon age

• minimal age

• relative age

Tags

NGSS.MS-LS4-1