Final answer:
A homogeneous mixture, or a solution, is a substance where all components are uniformly distributed throughout and its composition and properties are consistent. Examples include salt water and the air we breathe.
Step-by-step explanation:
A homogeneous mixture is defined as a combination of substances that has a uniform composition and properties throughout. This means that the mixture is consistent no matter where you sample it from, as it is made up of parts that are in the same state, have no visible boundaries, and are uniform in their distribution. An example of a homogeneous mixture, also known as a solution, would be salt water. Once the salt is dissolved in the water, it cannot be seen as distinct from the water itself, exemplifying the homogeneous nature of the mixture. Air is another example of a homogeneous mixture because it is made up of different gases that are mixed uniformly and the individual gases are not visible.