Question

You observe that when oil and water combine, oil always rests on top of the water. What can be said about the density of oil and water?

The density of oil must be greater than the density of water.
The density of oil must be less than the density of water.
The density of oil must be the same as the density of water.

Answer 1

Answer: As a result, when you add oil to a cup of water the two don't mix with each other. Because oil is less dense than water, it will always float on top of water, creating a surface layer of oil.