Adhesion
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Example:
Imagine trying to get a sticker to stick firmly onto a water bottle. Just like the sticker needs a good grip on the bottle's surface to stay put, adhesion describes how different substances, like the sticker and the bottle, attract each other at the molecular level. In this analogy, the sticker represents one substance, the water bottle represents another substance, and the sticking force between them is akin to the molecular attraction that defines adhesion.

Practice Version

Adhesion: The force of attraction between molecules of different substances. Adhesion. Adhesion is when different materials stick together because their molecules attract each other.