Earth Floor: Geologic Time

An 81-page slideshow that looks at the principles of geology with respect to relative dating, at different concepts describing geological processes, at absolute age and radiometric dating, at the eons and eras in the geologic time scale,...

How do scientists know the history of Earth before humans—or any mammals—existed? An epic "Eons" series video explains the larger history of geologic time. It highlights the eons, eras, periods, epochs, and ages scientists use to divide...

Take a quick look at Earth's geologic time scale.

[Free Registration/Login may be required to access all resource tools.] How the geologic time scale is divided.

A discussion of geologic time, along with a presentation of evidence for the time span involved.

In this Earth Science indoor laboratory inquiry, students will create their own geologic time scale based on observation of teacher supplied, historically correct fossil data and also relevant rock samples with the age of the rock sample...

Young scholars view Understanding Geologic Time on the Internet or by CD-Rom to explore the length of time that the Earth has existed.

This BLOSSOMS lesson will help students conceptualize the enormity of geologic time and learn about important events in Earth's history. Students will also learn how geologic time can help explain seemingly incomprehensible processes....

Students examine geologic time to scale. In this geologic time instructional activity, students create a time-scale metaphor that shows some of the Earth's important events. Students present their metaphor to the class.

Learn about geologic time, including the age of the Earth by putting it in terms of pages in a book.