Military Families

The official provider of online tutoring and homework help to the Department of Defense.

Check Eligibility

Higher Education

Improve persistence and course completion with 24/7 student support online.

How it Works

Public Libraries

Engage your community with learning and career services for patrons of all ages.

Learn More

Corporate Partners

Support your workforce and their families with a unique employee benefit.

Get Started

Subtopics

Earth's History

Sort by:

Information on the earths atmosphere. What types of gases are found in a pie chart.

Earth

Simply put, a fossil is the remains or evidence of any creature or plant that once lived on the Earth. Now let's look at the long answer.

Fossils-Facts-and-Finds

Timeline showing the geological evolution of Earth, with brief explanations of each period

The Geological Evolution of the Earth

An animated view of the Earth as it goes through each era with continental drift.

Berkley

Excellent interactive tool for a review of of various geologic eras, as well as the formation and structure of the earth and it's atmosphere.

Smithsonian Department of Paleobiology

Next >