Question

There are three main types of mixtures. Which is a homogeneous mixture?

Answer 1

"Homogeneous" means "identical throughout, uniform"

Answer 2

^^ In other words, having a single phase.

Answer 3

Well, it's not exactly the same.

You can have a single phase, yet a non homogeneous mixture if concentration (for instance) varies continuously.

Answer 4

@Vincent-Lyon.Fr
General Chemistry 9e - Ebbing Gammon
"A phase is one of several different homogeneous materials present in the
portion of matter under study...Also, the portion of matter under consideration
may consist of several phases of the same substance or several phases of different
substances."

Wikipedia - http://en.wikipedia.org/wiki/Phase_%28matter%29
"In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.[1] Examples of physical properties include density, index of refraction, magnetization and chemical composition. A simple description is that a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable."

Please clarify (as I never studied this concept from a teacher)