A lengthy scholarly article that discusses the geologic time scale, its history of development, age-dating events that occurred in different eras, and how absolute and relative dating are used to assess the ages of the Earth and Moon....

Learn about the history of Earth's climate in this Click and Learn. Learn how many factor control Earth's climate. Specifically, examine two of the most important factors: solar radiation and the composition of Earth's atmosphere.

Earth Day grew out of the environmental movement in the late 1960s in response to a series of environmental disasters that took lives, marred natural beauty and threatened animal species. An estimated 20 million Americans participated in...

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.

Portal of the University of California Museum of Paleontology provides access to the museum's extensive research resources and fossil holdings. Includes career preparation advice for future paleontologists and a series of links to...

Information about the element Zirconium, atomic number 40. Covers history of its discovery, sources, physical properties, atomic properties, how abundant it is on the Earth, details about permissible exposure, uses, and possible...

Information about the element, Zinc, atomic number 30. Covers physical and chemical properties, how abundant it is on the Earth, where it occurs, isotopes, zinc in the environment, its role in human health, and the history of its use in...

Explains what greenhouse gas is, how the greenhouse effect works, and the history of fossil fuel combustion. Causes of other damaging greenhouse gases, including methane, nitrous oxide, chlorofluoracarbons, hydrofluorocarbons, and...

Article explaining the history of our scientific understanding of volcanic activity, ending with questions for students about scientific methods and historical contexts.

A collection of articles on offshore oil. Some of the topics covered include the Deepwater Horizon oil spill, oil exploration and oil reserves, oil drilling, and the history of oil and gas.

Scientific article explaining what natural selection is, and how it manifests itself through genetics and from generation to generation. Natural selection is compared to genetic drift, both of which cause evolution to occur. The limits...

Gives definition of catalysis, an explanation of how it works, different kinds of catalysis and examples, substances that impact on the catalytic process, the many applications of catalysis, and a history of catalyst technology.

This activity is an inquiry-based, earth science field investigation of the geology of southeast Minnesota. Learners will make observations of rock outcrops and landforms in the region using maps, pictures, and field sampling, then use...

Travel site outlines the early history of Germany.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will begin to explain the use of chemical and physical properties in the historical development of the Periodic Table. They will be...

Article outlining the scientific history behind the evolution of theories about measuring time based on the movement of a pendulum, and about how gravity would impact a pendulum's movement depending on one's proximity to the Earth's...

Discusses gas as a state of matter, the history and use of the terms vapor and gas, and types of elemental gases.

This resource is a place for learning all about the Earth--the Earth's layers, its history, rocks and minerals, and interesting Earth science facts and discoveries. Explore, ask questions, find information, and meet American Museum of...

Learn about the scientific hypotheses of the origin of life on Earth. [5:55]

As part of a larger lesson plan on the the environment and the environmental movement, this lesson focuses on the movement as part of a larger emphasis on social movements in the 1960s. Find information about the history of Earth Day,...

[Free Registration/Login Required] This informational text passage shares information about the history of the earth and its landforms. This passage is a stand-alone curricular piece that reinforces essential reading skills and...

Use this study guide to understand the history of Paleozoic Life.

Understand the history of Cenozoic life in this study guide.

This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.