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The Fossil Record MS-LS4-1

NGSS

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 timeline of Earth's history based on major changes

A Timeline Of Earth's History Based On Major Changes.

Geologic Time Scale

Geologic Time Scale Simple Definition

a similar structure in different species, like a whale fin, bat wing and your arm

A Similar Structure In Different Species, Like A Whale Fin, Bat Wing And Your Arm.

Homologous Structure

Homologous Structure 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

the oldest rock layers are at the bottom and youngest are at the top

The Oldest Rock Layers Are At The Bottom And Youngest Are At The Top.

Law Of Superposition

Law Of Superposition Simple Definition

the evolutionary history of an organism and related species

The Evolutionary History Of An Organism And Related Species.

Phylogeny

Phylogeny Simple Definition

comparing the amount of radioactive and nonradioactive isotopes to determine rock age

Comparing The Amount Of Radioactive And Nonradioactive Isotopes To Determine Rock Age.

Radiometric Dating

Radiometric Dating Simple Definition

the theory that geologic processes are the same today as they were in the past

The Theory That Geologic Processes Are The Same Today As They Were In The Past.

Uniformitarianism

Uniformitarianism Simple Definition

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