States of MatterBy Ms Hoo / July 9, 2026 Back to: Unit 2: Thermal Physics In this lesson, we will learn about: properties of solids, liquids, and gases the processes of the changes of states of matter Back to Course Unit 2: Thermal Physics Next Lesson Random Motion of Microscopic Particles – Brownian Motion Lesson 2 within section 2.1 Kinetic Particle Model of Matter.