Fossils and Extinction 3-LS4-1

NGSS

a fossil formed when dissolved minerals fill a mold and harden

A Fossil Formed When Dissolved Minerals Fill A Mold And Harden.

Cast

Cast Simple Definition

the preserved traces and remains of an organism that lived long ago

The Preserved Traces And Remains Of An Organism That Lived Long Ago.

Fossil

Fossil Simple Definition

the history of life recorded by all the fossils we have collected

The History Of Life Recorded By All The Fossils We Have Collected.

Fossil Record

Fossil Record Simple Definition

a fossil from an organism that existed for a short time, it is used to determine the age of other fossils

A Fossil From An Organism That Existed For A Short Time, It Is Used To Determine The Age Of Other Fossils.

Index Fossil

Index Fossil Simple Definition

a rock fossil created when a buried organism dissolves

A Rock Fossil Created When A Buried Organism Dissolves.

Mold

Mold Simple Definition

a fossil formed in soft sedimentary rock, like a footprint

A Fossil Formed In Soft Sedimentary Rock, Like A Footprint.

Trace Fossil

Trace Fossil Simple Definition

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