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.
Other
Moorland School: Earth Science Zone: The Origin of the Earth
A webpage reviewing the origin of the Earth. Learn what Earth was like during its first billion years with an atmosphere that contained no oxygen. Understand that oxygen levels built up once green plants became more abundant. At the end...
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.
TeachEngineering
Teach Engineering: The Amazing Red Planet
The purpose of this lesson is to introduce learners to the planet Mars. This lesson will begin by discussing the location and size of Mars relative to Earth, as well as introduce many interesting facts about this red planet. Next, the...