That will take about 5 or 10 minutes. Now spin the jar instead of shaking it. Since oil floats on top of water, you might have thought that oil would float on top of alcohol, too. But the oil sinks to the bottom and the alcohol floats on top of the oil. Even though water and alcohol are both clear liquids, they have different densities.
Alcohol floats on top of oil because a drop of alcohol is lighter than a drop of oil the same size.
The answers to these questions have to do with the molecules that make up oil, water, and alcohol. Molecules are made up of atoms, and atoms are made up of positively charged protons, negatively charged electrons, and uncharged neutrons. The atoms that make up water molecules and alcohol molecules are arranged so that there is more positive charge in one part of the molecule and more negative charge in another part of the molecule. Molecules like this are called polar molecules. The charged particles in an oil molecule are distributed more or less evenly throughout the molecule.