Make particle theory click with a student-friendly walkthrough of solids, liquids, gases—and what a vacuum actually is. This editable PPT builds from the particle model to properties and real-life applications, then wraps with a quick plenary quiz for easy assessment. What’s inside Learning objectives: Describe solids, liquids, and gases by particle arrangement, separation, and motion; define a vacuum as space with no matter. (7Cm.06, 7Cm.05) Key vocabulary: solid, liquid, gas, particle,