This is a 21 slide PowerPoint presenation on an introduction to physical properties and physical changes. It includes 3 activites within the presenation to get kids moving, as well as some practice problems (density) for them to work on individually or with their partner. There are review questions on the last slide. Terms such as physical properties, density, and physical changes are defined and discussed within the PowerPoint. This presenation can be extended to 2 or 3 45-minute classes.