* Density is mass per unit volume. In simpler terms, it's how much "stuff" is packed into a given space.
* Denser objects sink in less dense objects.
Let's think about how these liquids behave:
* Oil floats on water. This means oil is less dense than water.
* Vinegar is mostly water (with some acetic acid).
* Milk is mostly water (with fat and other components).
* Fat (like in milk) is less dense than water.
Therefore:
1. Oil is the least dense of the three.
2. Vinegar is denser than oil because it has more water.
3. Milk is denser than oil but less dense than vinegar because it has a mixture of water and fat.
In order from least dense to most dense:
1. Oil
2. Milk
3. Vinegar
