Many pupils struggle to categorize and organize related content. Multiple quizzes on a variety of topics offer practice for these specific skills. Scholars move items around until they think each is placed in the proper position....

A discussion of geologic time, along with a presentation of evidence for the time span involved.

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.

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.

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

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.

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...

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.

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.

Details regarding the geology of national parks in the United States.

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.

Learn about fossils throughout geological time. Includes images of different types of fossils.

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...

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.

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.

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...

[Free Registration/Login Required] The New York Times maintains daily coverage of the latest in environmental news, including geology, global warming, wildlife and earthquakes.

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.

This timeline is a good resource if you are looking for brief descriptions of the geologic periods. Descriptions include pictures of common organisms for each period and the range of time covered by each period.

This site from Digital Library for Earth System Education provides materials for students and teachers on a huge array of topics. Search site by topic, grade level, and desired output (such as lesson plan, case study, assessment or...

A very comprehensive article about the ice-free corridor which was possibly the passageway for Paleoindians to enter North America. The discussion includes geology as well as anthropolpgy.

A discussion of a migration theory of Paleoindians that went down the west coast of North America. Read about food sources, the geology, and the research behind the theory.

Offers an easy to understand explanation of the earth's layers and the fossils we find in each layer. It explains how these are interpreted by scientists to represent the evolution of animal and plant life through the geological eras.

This interactive timeline reveals key geologic and biological events starting back 4.8 billion years to the present.