How does oil react to water?

Oil is less dense than water, which causes it to float on the surface when the two liquids are combined. Additionally, oil is hydrophobic, meaning it does not mix with water; instead, it forms distinct layers. When agitated, oil can create small droplets in water, but these droplets will eventually coalesce and separate again. This immiscibility is due to the differences in molecular structure and polarity between oil and water.