Science Education Resource Center at Carleton College
Serc: Relative Dating of Geologic Materials
A detailed set of exercises (downloadable) that guide students in developing an understanding of how scientists have created the geologic time scale.
Australian Museum
Australian Museum: The Geological 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.
Georgia Department of Education
Ga Virtual Learning: Historical Geology
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...
Smithsonian Institution
Smithsonian Science Education Center: Time: It's Like, So Deep
This video reviews over geologic time scale and methods to teach this appropriately in the classroom. [9:15]
American Geosciences Institute
American Geological Institute: Evolution and the Fossil Record
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...
ClassFlow
Class Flow: Life & Geologic Time
[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...
Other
Time Scavengers: Principles of Geology
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...
University of California
Ucmp: Understanding Geologic Time
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.
National Association of Geoscience Teachers
Nagt: Bringing the Geologic Time Scale Down to Earth in the Students' Backyard
This activity is specifically designed for a field trip to Drayton Hall, which is a historic plantation near Charleston, South Carolina. It does provide a model of how a similar activity could be designed for a local area, and there are...
Science Education Resource Center at Carleton College
Serc: My Geologic Address: Locating Oneself in Geologic Time and Process
Students find a local location on a series of geologic maps (local,regional,and global) working from small to large scale. Map keys and map features are consulted in order to compose a "geologic address" from the most specific to the...
Other
Fossil Museum: Geologic Time
Pictures of fossils are arranged in chronological sequence and by geologic period. Pictures include scientific names and location where the fossils were found.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: Hadean Eon
Journey into the past while reading this comprehensive overview of the Hadean Eon that covers topics such as the formation of the earth, its surface and atmosphere, fossil evidence, erosion and plate tectonics.
Other
Utah Geological Survey: How Do Geologists Know How Old a Rock Is?
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the...
American Geosciences Institute
American Geosciences Institute: Earth Science Week: It's About Time
To understand how a geologic time works, students make a personal timeline and compare it to a geologic timeline.
Curated OER
National Park Service: North Cascades National Park Geology
Resource explores the history and geology of the Cascade Mountains. Content includes a geologic story, virtual field trip, a look at plate tectonics and the rocks & minerals found in the Cascade Mountains, geologic maps, and more.
University of California
Ucmp: Online Exhibits
Visit the virtual exhibits at this site to learn more about paleontology, the history of the earth, and life on earth. Use the information on this site to understand geology, geologic time, evolution, and phylogeny.
Other
Usgs: Geology in the Parks
Details regarding the geology of national parks in the United States.
PBS
Pbs Learning Media: The Wall of Time
This illustrated timeline from the Lunar and Planetary Institute provides a journey through four-and-a-half billion years of time from the birth of our solar system to its current existence today.
Other
Virtual Fossil Museum: Fossils Across Geological Time and Evolution
Learn about fossils throughout geological time. Includes images of different types of fossils.
Other
Planetary Society: Relative and Absolute Ages in Histories of Earth and the Moon
A lengthy scholarly article that discusses the geologic time scale, its history of development, age-dating events that occurred in different eras, and how absolute and relative dating are used to assess the ages of the Earth and Moon....
Other
Grand Canyon Geology
Photos, illustrations, 3D graphs and animations are part of this investigation into the geology and landforms of the Grand Canyon. Learn detailed information on the formation of the canyon, the rock layers, and the prehistoric life that...
Other
Black Hills Institute of Geological Research: All About Fossils
The Black Hills Institute of Geological Research is a world-renowned center for paleontology. Here they describe in clear language how fossils are formed and preserved, and what information they give us about the past, particularly in...
US Geological Survey
Relative Time Scale
This is a good resource for anyone who wants to understand the historical development that led to our understanding of relative dating. This site also has links to index fossils and a table of geologic time.
Curated OER
National Park Service: Fossils in Time Unit
In this lesson, students learn about the earth's past by studying clues that have been left behind, such as fossils and rocks. Students will find the answers to many questions: What is paleontology?, What is geological time?, What can we...
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