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Western Oregon University: Earth System Science: Geologic Time [Pdf]
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,...
Science Education Resource Center at Carleton College
Serc: Investigating the Geologic Time Scale: Trends in Geologic Time
For 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...
University of California
Ucmp: Web Geological Time Machine
The Museum of Paleontology at Berkeley offers an online geological time machine which allows you to catch a glimpse of ancient eras in earth's history. Click into an "Era" to learn about its stratigraphy, life forms, localities, and...
CK-12 Foundation
Ck 12: Earth Science: Geologic Time Scale
[Free Registration/Login may be required to access all resource tools.] How the geologic time scale is divided.
CK-12 Foundation
Ck 12: Earth Science: Geologic Time Scale Study Guide
Take a quick look at Earth's geologic time scale.
CK-12 Foundation
Ck 12: Earth Science: Life and the Geologic Time Scale
[Free Registration/Login may be required to access all resource tools.] Describes relationship between evolution and the geologic time scale.
University of Utah
University of Utah: Genetic Science Learning: learn.genetics: Geologic Time
Appreciate the immensity of geologic time by scrolling through a timeline. Includes links to relevant portions of a video lecture and a detailed time line.
Center for Educational Technologies
Earth Floor: Geologic Time
This is a nice explanation of geologic time and Earth's major eras. Although this site is designed for younger students, it is mostly text with few images.
University of California
University of California Museum of Paleontology: Geologic Time
Learn about geologic time, including the age of the Earth by putting it in terms of pages in a book.
Georgia Department of Education
Ga Virtual Learning: Geologic Time and Correlation
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...
US Geological Survey
U.s. Geological Survey: Geologic Time
A discussion of geologic time, how scientists use the concept, and how they have determined its span.
University of California
University of California Museum of Paleontology: Geology and Geologic Time
This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.
Talk Origins Archive
Talk Origins Archive: Radiometric Dating and the Geological Time Scale
A lengthy article with lots of information about radiometric dating, including pictures and charts.
University of Texas at Austin
University of Texas: Texas Memorial Museum: Understanding Geologic Time [Pdf]
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...
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Geologic Time Scale Analogy
Introduce students to the vastness of geologic time and the concept of scale.
US Geological Survey
U.s. Geological Survey: Fossils, Rocks, and Time
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.
Science Education Resource Center at Carleton College
Serc: A Constructivist Teaching Model for Conceptualizing Geologic Time
The activity fosters critical thinking and allows for student generated essential questions to further their understanding of Earth's history and geologic time.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: The Oligocene
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.
US Geological Survey
Usgs: Geologic Time
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.
CK-12 Foundation
Ck 12: Life Science: 4.12 Geologic Time Scale
Understand the history of the Earth through geologic time.
The Wonder of Science
The Wonder of Science: Ms Ess1 4: Geologic Time Scale
Work samples, phenomena, assessment templates, and videos that directly address standard MS-ESS1-4: geologic time scale.
US Geological Survey
Usgs: What Is Geologic Time?
Understand the evidence for ancient earth and the geologic time scale. Learn on this site how the earth can help scientist date discoveries.
Utah Education Network
Uen: Nhmu: Time Machine a Journey Into the Past
Identify geologic time periods and the animals and plants that lived during that time period.
Science Education Resource Center at Carleton College
Serc: Layer Cake Geology
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,
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