Phases of Matter

The video tutorial explains the phases of matter: solid, liquid, and gas. It describes how substances can transition between these phases and the role of molecules in determining the properties of each phase. Solids have closely packed molecules, making them dense and firm. Liquids have more flexible molecules, allowing them to change shape, while gases have widely spaced molecules, enabling them to expand and fill space. The video also covers the behavior of fluids, which include liquids and gases, and how they flow and circulate. It concludes with a thought-provoking question about substances that never change phase.

What new insight or understanding did you gain from this video?