Liquid

The video tutorial explains the concept of liquids, one of the three phases of matter, alongside gases and solids. It describes the molecular structure of liquids, which allows them to have a definite volume but no definite shape, enabling them to flow and fill spaces. The tutorial also covers phase changes, such as melting and condensation, and uses water as an example to illustrate the properties of liquids. The video concludes with a question about whether wood has a liquid phase, encouraging further thought.

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