You slightly overfill your water glass and notice that the liquid forms a dome shape just above the glass's surface without spilling over. What property of water best explains this observation

cohesion

Explanation:

The property of water that best explains why it forms a dome shape above the glass's surface without spilling over is cohesion.

The cohesive property of water is the tendency of molecules of water to stick to one another. Generally, cohesion refers to the force of attraction between the same molecules. Water molecules have the tendency to stick to one another due to the existence of hydrogen bonds between the molecules.

The molecules of water above the glass surface are bounded to their fellow water molecules on one side and by air on the other side. Thus, the air-water boundary creates a kind of force that stems from the water molecules' inability to find a neighbor to bond with. This force is referred to as surface tension.