* Homogeneous Mixture: A homogeneous mixture has a uniform composition throughout. This means that the components are evenly distributed, and you can't visually distinguish them.

* Heterogeneous Mixture: A heterogeneous mixture has a non-uniform composition. You can see the different components and they are not evenly distributed.

In the case of 70% isopropyl rubbing alcohol, the isopropyl alcohol and water (the other component) are completely mixed and indistinguishable from each other. You can't see separate layers or particles of alcohol and water.

Therefore, it is a homogeneous mixture.