University of Kentucky
University of Kentucky: Important Dates and Cool Creatures in Earth History
A bullet list of important events in Earth's history broken down by eons, eras, periods, and epochs.
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....
CK-12 Foundation
Ck 12: Earth Science: Earth History and Clues From Fossils
How scientists can learn information about the past from fossils. [Free Registration/Login may be required to access all resource tools.]
CK-12 Foundation
Ck 12: Earth Science: Earth History and Clues From Fossils
[Free Registration/Login may be required to access all resource tools.] How scientists can learn information about the past from fossils.
CK-12 Foundation
Ck 12: Earth Science: Earth History and Clues From Fossils
[Free Registration/Login may be required to access all resource tools.] How scientists can learn information about the past from fossils.
CK-12 Foundation
Ck 12: Fourth Grade Science: Earth Science: Relative Ages of Rocks
[Free Registration/Login may be required to access all resource tools.] Looks at how stratigraphy can be used to determine the relative ages of rocks, how unconformities occur, ways to match rock layers in different areas, and how...
Encyclopedia of Earth
Encyclopedia of Earth: Climate Change: Ice Cores and History of Climate Change
Article describing research done in the West Antarctica, where ice cores were removed to a depth of two miles, providing information on climate change over the last one hundred thousand years. (Date published: Feb. 2, 2011)
University of California
Ucmp: A Relative Dating Activity
An learning activity to help learners grasp the concept of relative dating and geologic time.
PBS
The Dating Game: Radiocarbon Dating
Part of PBS-NOVA Online. An excellent explanation of how radiocarbon dating is done and why it works. Great material for earth science, history or biology classes.
CK-12 Foundation
Ck 12: Biology: History of Life
[Free Registration/Login may be required to access all resource tools.] Describes how scientists learn about the past by examining and dating fossils.
CK-12 Foundation
Ck 12: Biology: History of Life
[Free Registration/Login may be required to access all resource tools.] This comprehensive lesson by CK-12 explains how scientists learn about the past by examining and dating fossils.
CK-12 Foundation
Ck 12: Earth Science: Determining Relative Ages
[Free Registration/Login may be required to access all resource tools.] Distinguishes how to tell which rock unit is older than the ones around it and so reveal the geologic history of the region.
CK-12 Foundation
Ck 12: Biology: Earth Forms and Life Begins Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on the origin of life.
Other
Radford University: Environmental History Timeline
Worrying over the environment is nothing new, just the term "environmental" is. Investigate the history of concerns dating back to ancient civilization and looking forward into the future.
Science Education Resource Center at Carleton College
Serc: Radioactive Decay Calculator
Students will use this online Radioactive Decay Calculator to compute radioactive decay, timed decay, and timed solid disposal for a databank containing 116 isotopes. This calculator also features University of British Columbia disposal...
University of California
University of California Museum of Paleontology: Stories From the Fossil Record
This colorful, interactive site demonstrates how fossils can be used to discover a range of information about the past. Topics include Past Lives, Paleoecology, Geologic History, and Biodiversity.
Utah Education Network
Uen: Fossil Inferences
Arrange fossil pictures in sequence from oldest to youngest.
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...
CK-12 Foundation
Ck 12: Life Science: 4.4 Fossils
Understand fossils and the fossil record as it relates to Earth's history.
Science Education Resource Center at Carleton College
Serc: Geo Logic: The Big Five Mass Extinctions
Using GEOLogic puzzles, students are asked to match the five largest mass extinction events with their relative dates, approximate duration, and severity based on clues given from various perspectives.
Utah State University
Teacher Link: Celebrations: A Resource Guide for Teachers
TeacherLINK at Utah State University offers a wealth of topics and project information on celebrations held throughout the world. Click on "Topics and Authors," to access a long list of available lesson plans on a variety of...
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.
Curated OER
National Park Service: What Is Geologic Time?
A discussion of geologic time, along with a presentation of evidence for the time span involved.
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.