It's About Time
Volcanic History of Your Community
Did you know there are 20 volcanoes erupting at any given time? Pupils look at various igneous rocks, read local geologic maps, and determine if their area has a history of volcanic activity. A reading passage and analysis questions...
Curated OER
Rocks and Minerals
Take young geologists on an exploration of the collection of rocks and minerals that we call Earth with an upper-elementary science lesson. Through a series of class discussion and hands-on investigations, students learn about the...
![Do Dea: Earth Science: Unit 3: Geologic History: Timeline of the Earth [Pdf] Handout](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Do Dea: Earth Science: Unit 3: Geologic History: Timeline of the Earth [Pdf] Handout")
Department of Defense
Do Dea: Earth Science: Unit 3: Geologic History: Timeline of the Earth [Pdf]
This 2-page handout provides short descriptions of the different aeons, eras, and periods in the Earth's geological history.
CK-12 Foundation
Ck 12: Earth Science: Formation of Earth Study Guide
Understand the formation of the Earth using this study guide.
Encyclopedia of Earth
Encyclopedia of Earth: Geology: Limestone
Article explaining what limestone is, how it is formed, where it occurs, the different types, and how it has been used throughout history. (Published: August 8, 2010)
Other
The Geological Society: Climate Change: Evidence From the Geological Record
In this statement, The Geological Society describes the changes that are happening to the global climate in terms of what evidence has been observed in our geological history. For example, what happened during past events of rapid...
CK-12 Foundation
Ck 12: Earth Science: Geologic Time Scale Study Guide
Take a quick look at Earth's geologic time scale.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: Hadean Eon
Journey into the past while reading this comprehensive overview of the Hadean Eon that covers topics such as the formation of the earth, its surface and atmosphere, fossil evidence, erosion and plate tectonics.
Center for Educational Technologies
Earth Floor: Geologic Time
This is a nice explanation of geologic time and Earth's major eras. Although this site is designed for younger students, it is mostly text with few images.
University of California
Ucmp: Web Geological Time Machine
The Museum of Paleontology at Berkeley offers an online geological time machine which allows you to catch a glimpse of ancient eras in earth's history. Click into an "Era" to learn about its stratigraphy, life forms, localities, and...
Encyclopedia of Earth
Encyclopedia of Earth: Geology: Petroleum Crude Oil
Article explaining what petroleum crude oil is, its composition, how it is formed, sources, how it is recovered, different classifications, products made from it, and its history. Includes a chart showing statistical information for...
Estrella Mountain Community College
Online Biology Book: Paleobiology: Fossils and Time
Find out how fossil evidence has been the major link to learning about Earth's geologic history. See several illustrated interpretations of a geologic time scale in this online biology textbook.
National Science Foundation
National Science Foundation: Ice Core Facility (Nsf Icf): About Ice Cores
A fantastic resource for learning about how ice cores are collected, the information we can learn from them about Earth's climate history, the types of research being done with them, and how they are stored. Includes lots of videos.
CK-12 Foundation
Ck 12: Earth Science: Early Atmosphere and Oceans Study Guide
This comprehensive study guide covers the main terms and concepts needed for an earth science unit on the early atmosphere and oceans. Review questions are included at the bottom of the study guide.
CK-12 Foundation
Ck 12: Earth Science: Determining Relative Ages Study Guide
This comprehensive study guide covers the main terms and concepts needed for an earth science unit on determining relative ages. Review questions are included at the bottom of the study guide.
CK-12 Foundation
Ck 12: Earth Science: Correlation Using Relative Ages Study Guide
This comprehensive study guide covers the main terms and concepts needed for an earth science unit on correlation using relative ages. Review questions are included at the bottom of the study guide.
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.
Smithsonian Institution
National Museum of Natural History: Paleobiology: The Archaean Eon
Journey into the past while reading this comprehensive overview of the Archaean Eon that covers topics such as early continents and oceans, first life on Earth, Earth's atmosphere, fossil evidence, and plate tectonics.
Khan Academy
Khan Academy: Gallery: Geology
See the wonders of the world in this gallery of the features and physical processes of Earth.
Khan Academy
Khan Academy: Principles of Geology
Read an excerpt from Charles Lyell "Principles of Geology" book on this site.
Other
British Geological Survey: Past Climates Examples
Describes the climates during several periods in the Earth's history.
US Geological Survey
Usgs: Earth's Water: Lakes and Reservoirs
The USGS reviews the differences between lakes and reservoirs. They discuss the history of freshwater and salt water lakes. Click Home to access the site in Spanish.
PBS
Pbs: Nova: Learning About Earth's History With Ice Cores
This resource explains how ice cores are used to analyze past events like air pollution, volcanic activity, climate changes, and radioactivity.
CK-12 Foundation
Ck 12: Earth Science: Principle of Horizontality Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide briefly summarizes key points about the Principle of Horizontality and how it relates to sedimentary rock formation. Includes a few questions to...