This document discusses the three main states of matter - solid, liquid, and gas - and how changes between these states occur through physical processes involving heat. It also examines factors like temperature that can cause materials to transition between different states of matter, and defines diffusion as a property specific to liquids and gases where particles can spread out and mix.

1. States of Matter
Solid
Liquid
Gas

10. Changes in Matter States

19. Heat and Cold Curves /
Physical State change curve

24. Factors that cause Changes in matter

27. Diffusion the property
of Liquid and Gas