eSchool Today
E School Today: What Is Matter
Learn about matter, its three states, changes of state, how matter behaves, and physical and chemical changes in matter.
Science4Fun
Science4 Fun: States of Matter
Provides interesting information about the three basic states of matter: solid, liquid, and gas.
CK-12 Foundation
Ck 12: Earth Science: States of Water Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about the three states of water. Includes a few questions to check for understanding.