This lesson is part of the heat and temperature unit. Students examine the changes that occur in all states of matter as heat is added or removed. Specific attention is paid to the movement of particles as the object(s) are heated or cooled. The lesson is designed to meet Alberta Education requirements in Grade 7 science, but can be used and modified to fit your own needs!This interactive lesson contains:- PowerPoint presentation (20 slides)- Teacher lesson plan (.docx file)- Student notes page