What term describes the ability of a liquid to flow through narrow spaces, such as a thin tube or paper towel, without the assistance of external forces like gravity?

Explanation

Capillary action is the ability of a liquid to move through narrow spaces due to the combined effects of cohesion, the attraction between liquid molecules, and adhesion, the attraction between liquid molecules and the surface of the narrow space. This phenomenon explains why water rises up a thin paper towel or a narrow glass tube, and it also plays an important role in helping water move upward from a plant’s roots through its stem. The narrower the tube or space, the higher a liquid can typically rise through capillary action. Explore more Everyday Science MCQs on mcqstutor to keep practicing.