And this type of strong intermolecular interaction, or intermolecular bond, is known as a hydrogen bond. So we see the fact that water is a polar molecule. And because it consists of these very tiny H atoms, we form these very strong intermolecular bonds, known as hydrogen bonds, when many of these water molecules actually are found in close proximity. Now, these two properties lead directly into something called the hydrophobic effect. So the hydrophobic effect is a manifestation of these two properties, as we'll see in just a moment. And the hydrophobic effect plays an important role in the field of biochemistry.