Engaging hands on science lessons for grades 2-6 on the three states of matter.

The Middle School Chemistry Project from the American Chemical Society (ACS). 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 in Middle School Chemistry, a resource of guided, inquiry-based lesson plans that covers basic chemistry concepts along with the process of scientific investigation.

The Middle School Chemistry curriculum helps students: Ask scientific questions and investigate them; Design and conduct experiments; Understand their observations on the molecular level; Record and communicate results.

This free curriculum includes for teachers: Comprehensive 5-E lesson plans; Detailed procedures for activities; Science background for teachers; Molecular model illustrations and animations; Student activity sheets and student reading; Test bank of questions and answers for each chapter.

Students experiment to see if the temperature of two clear colorless solutions affects how fast they react.