[Free Registration/Login may be required to access all resource tools.] Discover how scientists learn about Earth's interior using seismic waves, meteorites, density, and the magnetic field. Additional resources are available for download.

Understand the basic structure of atoms and molecules in the Earth's crust.

Overview of the basic concepts behind evolution, such as gene variation and adaptations.[Free Registration/Login may be required to access all resource tools.]

This set of activities introduces students to the basic properties and measurements of soil water, and how the global distribution of soil moisture is monitored.

Scholars explore the Earth science topic of the Earth's basic structure. The tutorial consists of definitions and pictures about the Earth's crust.

Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.