Relative dating of rock layers worksheet

Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history.

These major concepts are part of the Denver Earth Science Project's "Paleontology and Dinosaurs" module written for students in grades 7-10.

Locally, physical characteristics of rocks can be compared and correlated.

The complete "Paleontology and Dinosaurs" module takes approximately four weeks to teach. " activity is a 30-minute introduction to geologic time.

INTRODUCTION Scientists have good evidence that the earth is very old, approximately four and one-half billion years old.

On a larger scale, even between continents, fossil evidence can help in correlating rock layers.

The Law of Superposition, which states that in an undisturbed horizontal sequence of rocks, the oldest rock layers will be on the bottom, with successively younger rocks on top of these, helps geologists correlate rock layers around the world.

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