The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

Question

Quizplus · Accepted Answer

Adhesion is the attraction between molecules of different substances, in this case, water and glass. Cohesion is the attraction between molecules of the same substance, in this case, water molecules. Since adhesion between water and glass is stronger than cohesion within water, it causes the water to curve upward at the edges, creating a concave shape.

The Meniscus for Water Is Curved Upward at the Edges