Homogeneous and heterogeneous mixtures mixture is air. In physical chemistry and materials science this refers to substances and mixtures which are in a single phase. This is in contrast to a substance that is heterogeneous. A solution has been a special type of homogeneous mixture. Solutions are homogeneous because the ratio of solute to solvent remains the same throughout the solution even if homogenized with multiple sources, and stable because the solute will not settle out after any period of time, and it cannot be removed by a filter or by centrifuge. This type of mixture is very stable, i.e., its particles do not
Who is a Jew? in Jewish congregations. A person with one or two grandparents enrolled in a Jewish congregation could be classified as "Mischling", a crossbreed, of "mixed blood", if they were not a member of a Jewish congregation at the time the Nuremberg Laws were enacted. Only people with at least two of their grandparents of "German blood" could be German Reich's citizens, other Germans dropped into the new second class group of citizens, the so-called state citizens. If a person, with grandparents of the same religious combination, was enrolled as a member of a Jewish congregation in 1935 or would join later,