Glossary (Version 8.4)

The cycling of Earth over a period of 400 to 600 million years from a single continent and ocean with an inferred icehouse climate to many continents and oceans with a moderate to warm climate.

A set of concepts, claims and/or laws that can be used to explain and predict a wide range of related observed or observable phenomena. Theories are typically founded on clearly identified assumptions, are testable, produce reproducible results and have explanatory power.