CK-12 Foundation
Ck 12: Earth Science: Atoms to Molecules Study Guide
Understand the basic structure of atoms and molecules in the Earth's crust.
CK-12 Foundation
Ck 12: Earth Science: Adaptation and Evolution of Populations
Overview of the basic concepts behind evolution, such as gene variation and adaptations.[Free Registration/Login may be required to access all resource tools.]
Other
Moorland School: Earth Science Zone: The Structure of the Earth
Take a look at the Earth from the inside out. This site shows the different layers of the earth with an explanation of the rocks and materials in each layer. Includes a quiz on the structure of Earth.
Morning Earth
How Life Works: Biosphere Is Process: Life Helps Make Earth's Crust
Scholars explore the Earth science topic of the Earth's basic structure. The tutorial consists of definitions and pictures about the Earth's crust.
Estrella Mountain Community College
Online Biology Book: The Nature of Science and Biology
Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.