Water molecules refer to two hydrogen atoms and one oxygen atom that are bonded together in a specific arrangement. Water is made up of these small groups, which come together to form larger droplets or bodies of water. The unique properties of water, such as its ability to dissolve substances, its high heat capacity, and surface tension, can be attributed to the interactions between these molecules. Understanding the behavior of water molecules is essential for many scientific disciplines including chemistry, biology, geology, and meteorology.