Khan Academy
Khan Academy: What Is the Biosphere?
This article explains that as our knowledge of life on the planet evolves, we've come to use the word biosphere as a way of explaining the entire intertwined network of life on Earth. This concept combines an understanding of geology,...
Utah Education Network
Uen: Fossil Inferences
Arrange fossil pictures in sequence from oldest to youngest.
University of California
University of California Museum of Paleontology: Geology and Geologic Time
This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.
University of California
University of California Museum of Paleontology: Uniformitarianism
Read about the pioneers in Earth's geologic history and their discovery of how the process of uniformitarianism shaped the study of evolution.
CK-12 Foundation
Ck 12: Life Science: 4.4 Fossils
Understand fossils and the fossil record as it relates to Earth's history.