What does adhesion refer to in terms of molecular forces?

Adhesion specifically refers to the attraction between unlike bodies or different types of molecules. This phenomenon is crucial in various scientific contexts, particularly in understanding how water interacts with other materials. For example, when water adheres to the surface of a glass, it demonstrates how adhesive forces are at play, allowing the water molecules to cling to the glass surface, which is composed of a different material.

This concept is foundational in explaining natural processes such as capillary action, where water rises within narrow spaces against gravity due to its adhesive properties with surrounding materials. Adhesion plays a significant role in how substances interact within biological systems, environmental contexts, and various technological applications. Understanding adhesion helps clarify the behavior of water and other liquids when they come in contact with different surfaces, contributing to the overall comprehension of water quality and behavior in ecosystems.