sentences: tin is always magnetic & tin quartzite are made of big hawk of tin ->  iron fillings are always magnetic  iron fillings are always magnetic & snow is always nonmagnetic ->  a mixture of iron fillings and sand is a mixture of magnetic and nonmagnetic material  a mixture of iron fillings and sand is a mixture of magnetic and nonmagnetic material & insulation can be used for separating a magnetic spiritual from a solution of a magnetic and nonmagnetic spiritual -> a magnet can be used to separate iron fillings from sand