University of California
Ucmp: Divisions of Precambrian Time
This site provides a brief overview of the Precambrian Era and provides a clickable chart that breaks down this era into five different time frames. A lot of info is provided on each of the five.
American Geosciences Institute
American Geosciences Institute: How Do Species Change Over Geologic Time?
Find out about the ways that species change and evolve over time and generations.
Estrella Mountain Community College
Online Biology Book: Paleobiology: Fossils and Time
Find out how fossil evidence has been the major link to learning about Earth's geologic history. See several illustrated interpretations of a geologic time scale in this online biology textbook.
Other
Arkansas Geologic Survey: Geologic History of Arkansas
An overview of the different geologic time periods and how each affected the area of what is now the state of Arkansas.
Alberta Online Encyclopedia
Alberta Online Encyclopedia: Geology
The geology of Alberta is profiled on this site. Drop menus reveal sub-topics ..geological time scale, rock formations in Alberta, and so forth.Graphics and maps are included.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Geologic Age
Explore geologic time of the Earth and learn how radioactive decay helps to establish a timeline.
![Ohio Memory Project: Geography and Natural Resources of Ohio [Pdf] Article](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Ohio Memory Project: Geography and Natural Resources of Ohio [Pdf] Article")
Other
Ohio Memory Project: Geography and Natural Resources of Ohio [Pdf]
Read about the geography and natural resources of Ohio in your study of this state. Discusses geology, rock and mineral resources, geologic time, and glaciation.
University of California
Ucmp: A Relative Dating Activity
An learning activity to help students grasp the concept of relative dating and geologic time.
University of California
Ucmp: Sequencing Time
Lesson plan in which students place events in sequence, comparing their life to the history of the Earth.
Other
American Coal Foundation: Lesson Plan: How Was Coal Formed?
Two-part lesson in which students learn about when and how coal was formed. They will do research on geologic time frames and order them by eon, era, period, or epoch.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Texas Rocks
For this investigation, students start exploring the U.S. Geological Survey's (USGS) online version of the geologic map of Texas. The geologic time scale shown will help them figure out how old the rocks are in various parts of Texas.
US Geological Survey
U.s. Geological Survey: Building Stones of Our Nation's Capital
Pictures and text describe the source and appearance of many of the stones used in the buildings and monuments in Washington, D.C. Included are a geologic time chart and an illustrated map of the geologic and geographic features of the...
US Geological Survey
The Numeric Time Scale
This is a good source for getting an in-depth description of using radioactive decay to measure the ages of rocks. In addition to describing the process of radiometric dating, this resource also includes a geologic time scale and four...
Department of Defense
Do Dea: Earth Science: Unit 3: Geologic History: Timeline of the Earth [Pdf]
This 2-page handout provides short descriptions of the different aeons, eras, and periods in the Earth's geological history.
Texas Instruments
Texas Instruments: Geologic Time Line
A time line of Earth's geologic periods from 600 million years ago.
Science Education Resource Center at Carleton College
Serc: Interpreting the Geologic History of Canyon De Chelly
Earth Science teachers will combine field observations with the information given in the classroom to interpret the geologic history of Canyon de Chelly, Arizona.
US Geological Survey
U.s. Geological Survey: Greenhouse Gases [Pdf]
Lesson plan in which young scholars observe and contrast thermal properties of three major greenhouse gases. Using simple, readily available materials, students collect temperature change over time for dry air, water-saturated air,...
New York Times
New York Times: Science
[Free Registration/Login Required] The New York Times maintains daily coverage of the latest in environmental news, including geology, global warming, wildlife and earthquakes.
US Geological Survey
U.s. Geological Survey: Real Time Earthquake Map
An interactive, real-time map showing current earthquakes happening all over the world. Students may choose options for which earthquakes to display by age, depth, magnitude, or intensity.
Annenberg Foundation
Annenberg Learner: Earth and Space Science: The Geologic Timeline
Take this online quiz and test your knowledge of geological history, and the formation of our atmosphere, water, crust, oxygen, tectonic plates, Moon, and the rest of the Earth.
University of Oxford (UK)
Oxford University Museum of Natural History: The Learning Zone: Fossils
This excellent website walks students through the basics of understanding fossils. It emphasizes that most common fossils would be invertebrates and, after learning more about these life forms, students can choose to take a quiz. The...
Estrella Mountain Community College
Online Biology Book: Paleobiology: The Late Paleozoic
College-level biology book covers the Late Paleozoic geologic time period in Earth's history. See photographs of fossil evidence from that era in addition to diagrams to help with understanding.
Science Education Resource Center at Carleton College
Serc: Adventures at Dry Creek
This educational module enables students (5-12) to experience ongoing research of University of California paleontologists studying about life in Montana 60-70 million years ago. It gives students the opportunity to experience the...
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Mud Fossils
In this lesson students will look at the major divisions of geologic time and learn about the fossils and forms of life which existed during those periods, helping them to understand how the age of rocks are preserved.
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