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

In this amazing interactive tutorial you will learn about what methods are used by geologists to learn about the history of the Earth. Investigate a geologic time scale and learn about how scientists have developed and organized a record...

A discussion of geologic time, how scientists use the concept, and how they have determined its span.

This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.

A lengthy article with lots of information about radiometric dating, including pictures and charts.

A lesson plan containing two activities for students to gain a better understanding of geologic time scale. The first activity allows students to get a visual of geologic time by role playing events in time on a football field. The...

Introduce young scholars to the vastness of geologic time and the concept of scale.

Publication delves into the importance of studying the Earth's history and how we go about doing it. View pictures and diagrams showing the geological time scale and fossil succession.

The activity fosters critical thinking and allows for student generated essential questions to further their understanding of Earth's history and geologic time.

Travel through Earth's history to learn about the Oligocene time period, which is characterized by the appearance of most of the living families of mammals.

This large U.S. Geological Survey site offers a look at the age of the earth, how radiometric dating is used to calculate it, the major divisions of geologic time, and the classification and use of fossils.

Understand the history of the Earth through geologic time.

Work samples, phenomena, assessment templates, and videos that directly address standard MS-ESS1-4: geologic time scale.

Understand the evidence for ancient earth and the geologic time scale. Learn on this site how the earth can help scientist date discoveries.

Identify geologic time periods and the animals and plants that lived during that time period.

Using a cake analogy, this activity teaches concepts such as: geologic time, rock layers, fossils, Law of Superposition, and relative dating. Activity can be modified to grade level and appropriate content for students,

A detailed set of exercises (downloadable) that guide learners in developing an understanding of how scientists have created the geologic time scale.

What was Australia like during prehistoric times? Follow through history from 110 million years ago until the present and discover the different mammals, birds, and reptiles.

In this interactive tutorial you will explore how geologists use clues in rocks to determine the order in which rocks formed. Learn how principles of radioactivity are used to assign actual ages to rocks. Students will explore fossils...

This video reviews over geologic time scale and methods to teach this appropriately in the classroom. [9:15]

The American Geological Institute has done an excellent job of defining and explaining evolution in this online booklet. Darwin, fossils, natural selection, and change over time are some of the concepts that are covered. Make sure to see...

[Free Registration/Login Required] This Flipchart accompanies chapter 14 in the Glencoe Earth Science text. The flipchart contains pictures that help students learn about Geologic time: Paleozoic, Mesozoic, Cenozoic and explains...

This site was created by two geoscientists. They explain the Principles of Geology. These are general rules, or laws, that are used to determine how rocks were created and how they changed through time. They are also used to determine...

A slideshow for teachers and students exploring Earth's geologic timeline and history. Click the buttons at left to select the teacher or student version.