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.

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.

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

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...

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 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 comprehensive page discusses the Asteroid Impact vs. Volcano-Greenhouse dinosaur extinction debate. It was written by paleontologist, professor, and scientist Dr. Dewey McLean.

During your lifetime, you will use more than a million pounds of rocks, minerals, and metals. Dig through this web site and find out how.