Here's why:

* Water molecules are polar: The oxygen atom in a water molecule has a slightly negative charge, while the hydrogen atoms have a slightly positive charge. This creates a dipole moment within the molecule.

* Hydrogen bonds form: The slightly positive hydrogen atoms in one water molecule are attracted to the slightly negative oxygen atoms in another water molecule. This attraction is called a hydrogen bond.

* Strong attraction: Hydrogen bonds are relatively strong compared to other intermolecular forces. This means that water molecules are strongly attracted to each other.

This strong attraction between water molecules is responsible for many of water's unique properties, including:

* High boiling point: Water has a higher boiling point than many other liquids because it takes a lot of energy to break the hydrogen bonds between the molecules.

* High surface tension: The strong attraction between water molecules creates a strong surface tension, which allows water to form droplets and support light objects.

* Universal solvent: Water's ability to form hydrogen bonds allows it to dissolve many substances, making it an excellent solvent.

Let me know if you have any other questions!