What property of water forms a meniscus?
The property of water that forms a meniscus is called surface tension. Surface tension is the attractive force between water molecules that causes the liquid to behave as if it has a thin film or skin on its surface. This force causes water to be pulled upward against the force of gravity, resulting in a curved shape at the boundary between the water and the surface it is in contact with, known as a meniscus.
To observe a meniscus, you can perform a simple experiment. Take a clean, narrow glass tube or a graduated cylinder and fill it with water. Slowly and carefully, you will notice that the water rises slightly at the edges and forms a concave shape, creating a meniscus. The shape of the meniscus depends on whether the water molecules are more attracted to each other (resulting in a concave meniscus) or to the container surface (resulting in a convex meniscus).