Resource provides the ten signs that tell when a chemical change has occured. Each sign has a detailed explanation.

Online textbook reviews fundamentals of chemistry and physical science via slideshow presentations, notes, and videos. Materials for classroom activities engage students in inquiry-based, hands-on investigations covering molecular...

Online textbook reviews fundamentals of chemistry and physical science via slideshow presentations, notes, and videos. Materials for classroom activities engage students in inquiry-based, hands-on investigations covering molecular...

A series of interactive applets use scientific models to teach some basic concepts of matter, including states of matter and physical and chemical changes.

Identify chemical and physical changes and the differences between the two.

Learn to identify changes in matter and explain what happens as matter changes. The lesson is supplemented with several experiments to reinforce key concepts.

A virtual experiment bringing you to the center of combustion! Understand how fire ignites, what makes a flame, and how molecules rearrange themselves in chemical reactions. This interactive activity gives students four different...