* Mixtures are combinations of substances where each substance retains its individual properties. You can physically separate the components of a mixture.

* Solutions are homogeneous mixtures where one substance (the solute) dissolves completely into another (the solvent).

In the case of sulfur and iron filings:

* You can see both components – you can distinguish the yellow sulfur from the gray iron filings.

* They don't chemically react – the sulfur and iron don't combine to form a new substance.

* They can be easily separated – you could use a magnet to separate the iron filings from the sulfur.

Let me know if you have more questions about mixtures and solutions!