Wikimedia
Wikipedia: Materia
Explore the concept of matter in this Spanish-language encyclopedia entry. This site features the properties of matter, the Law of Conservation of Matter, and other important features of matter.
CK-12 Foundation
Ck 12: Evolution of the Atomic Model
[Free Registration/Login may be required to access all resource tools.] Students take a closer look at how our understanding of the atom has evolved over time.
NASA
Nasa: Beginner's Guide to Aerodynamics
Includes exhaustive information and a wealth of activities pertaining to aerodynamics and the physics of flight.
Chem Tutor
Chem Tutor: Chemistry: Reactions
This lesson focuses on chemical reactions including what they are and an explanation of each part of a chemical equation.
Other
Homewood City Schools: Classification of Matter
This Homewood City Schools site has an outline form and contains lots of information about the classification and composition of matter. Some of the topics covered are matter and temperature, changes in state, composition of matter, and...
Texas Education Agency
Texas Gateway: Linear Momentum and Collisions: Glossary
This is a glossary of the terms and definitions used in Chapter 8: Linear Momentum and Collisions from the AP Physics online text.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Colliding Spheres
This lab activity from the Illinois Institute of Technology lets students investigate the impact of collisions upon the velocity and momentum of the colliding objects. Requires understanding of vectors.