Curated OER
The Ocean Floor
Practice reading comprehension by approaching oceanography through 2 pages of informational text. The text compares the ocean floor to the Grand Canyon to gives students perspective, and gives a brief coverage of the earth's crust and...
Exploratorium
Exploratorium: Earthquake Faultline Earthquake Activities
This outstanding website provides an excellent variety of hands-on earthquake activities to help you understand what causes earthquakes.
CK-12 Foundation
Ck 12: Fourth Grade Science: Earth Science: Theory of Plate Tectonics
[Free Registration/Login may be required to access all resource tools.] Discusses what a tectonic plate is and how scientists can recognize its edges, how the plates move by convection in the mantle, the three types of plate boundaries...