* Heterogeneous mixtures have components that are not evenly distributed throughout. You can visually distinguish the different parts.

* Iron filings are tiny pieces of iron metal. If you look closely at a mixture of iron filings, you'll see individual pieces of metal, each with a distinct shape and size.

* Homogeneous mixtures have components that are evenly distributed. You can't see the individual parts. Salt dissolved in water is a good example of a homogeneous mixture.

Let me know if you have any other questions!