What is a separating mixture of sugar powdered iron and sawdust?

Yes - First, you pour water into the mixture, and mix thoroughly. The sugar will dissolve into the water, but the sawdust won't. Then you get filter paper and make a cone with it (fold it into a quarter then push at the sides), then put it in a funnel and put that in a beaker/pot (depends on amount of mixture). When all of the water has drained through the paper, you will be left with sawdust on the filter-paper and sugar-water in the beaker-pot. To separate the sugar from the water, heat the water up until it has all evaporated, leaving sugar crystals in the pot/beaker.