Source: wikibot/capillary-action
= Capillary action
{wiki=Capillary_action}
Capillary action, also known as capillarity, is a phenomenon that occurs when liquid rises or falls in a narrow space, such as a thin tube or porous material, due to the combined effects of cohesion and adhesion. **Key aspects of capillary action include:** 1. **Cohesion**: This is the attraction between molecules of the same substance. In the case of water, hydrogen bonds cause water molecules to be attracted to each other.