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# Determining Relative Ages

## Using certain principles it is possible to determine the relative ages of rock units and reveal the geologic history of the region.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Determining Relative Ages

How to determine the relative ages of rocks.
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## Determining Relative Ages

by CK-12 //basic
How to determine the relative ages of rocks.
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## Determining Relative Ages

How to determine the relative ages of rocks.
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## Rock Formations, Fossil Evidence, and Relative Age S.6.3.2 (MS-ESS1-4)

How to determine the relative ages of rocks through evidence from rock formations and fossil evidence in the Earth's history.
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## Determining Relative Ages

by Jim Doherty, Ph.D. //at grade
How to determine the relative ages of rocks.
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## Determining Relative Ages 1.5

by Nancy Strand //basic
How to determine the relative ages of rocks.
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## Determining Relative Ages

How to determine the relative ages of rocks.
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## Determining Relative Ages

How to determine the relative ages of rocks.
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• Video

## Law of Superposition

A video lesson on the law of superposition, which is used to determine the relative ages of rocks. Courtesy of bozemanbiology.
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• Lesson Plan

## Understanding Geologic Time Lesson Plan

Students take an informational tour to gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.
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## Determining Relative Ages Quiz - MS ES

by CK-12 //basic
Reviews how to determine the relative ages of rocks.
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## Determining Relative Ages Quiz

Quiz on Determining Relative Ages
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• Critical Thinking

## Determining Relative Ages Discussion Questions

A list of student-submitted discussion questions for Determining Relative Ages.
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• Real World Application

## John Day Fossil Beds

by CK-12 //basic
The John Day Fossil Beds in eastern Oregon have a weath of fossils that span a long period of time. The relative ages are well constrained becauase a volcanic ash has been radiometrically dated.
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• Real World Application

## The Grand Staircase

Explores the rock units of the Grand Staircase and the geologic history they reveal.
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• Real World Application

## Knowing Ancient Earth

Learn about the Precambrian rocks of the Grand Canyon Supergroup and what they reveal about the ancient Earth.
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• Study Guide