The Gravestone Project, part of the global citizen science program called EarthTrek, seeks volunteers to visit cemeteries around the world and collect scientific data on how marble gravestones are weathering.

[Free Registration/Login may be required to access all resource tools.] Elaborates on radioactive decay as a tool for determining the age of certain minerals and other materials, including the limits of the technique.

The purpose of this activity is to test the conductivity of various minerals with a simple electrical circuit and draw conclusions about which ones would be used in electronics.

Small groups to research products made from petroleum other than fuels. The challenge is to find such products "hiding in plain sight."

[Free Registration/Login may be required to access all resource tools.] Presents the classifications of igneous rocks based on silica content.

[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about rocks and their properties. Includes a few questions to check for understanding.