"you have a mixture made os two substances, one with a higher density than the other. how could you separate the substances in the mixture?
a) boil the mixture so that the substances with the hightest densities turn into gas
b) add electric current to the mixture, the one with most mass will split first.
c) freeze the mixtures because the substance with the lower density will turn solid first
d) centrifuge the mixture because the substance with the highter density will be pulled to the bottom"