What happens when solids, liquids, and gases are heated and cooled? Why is one substance more or less dense than another? What causes certain substances to dissolve in water? What happens when a chemical reaction takes place?
These questions and many more are explored at MiddleSchoolChemistry.com, a resource of guided, inquiry-based lesson plans that covers basic chemistry concepts along with the process of scientific investigation.
Investigate the world of atoms and molecules through hands-on inquiry-based activities and molecular model animations.