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Rock Layers Geologic Time MS-ESS1-4

NGSS

any method of measuring the age of an object, like tree rings or carbon dating

Any Method Of Measuring The Age Of An Object, Like Tree Rings Or Carbon Dating.

Absolute Dating

Absolute Dating Simple Definition

the largest unit of the geologic time scale, it is divided into eras, periods, and epochs

The Largest Unit Of The Geologic Time Scale, It Is Divided Into Eras, Periods, And Epochs.

Eon

Eon Simple Definition

the second-longest unit of geologic time, it is divided into periods

The Second-longest Unit Of Geologic Time, It Is Divided Into Periods.

Era

Era 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 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 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

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

a method of comparing fossils or rocks to determine which is older

A Method Of Comparing Fossils Or Rocks To Determine Which Is Older.

Relative Dating

Relative Dating Simple Definition

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