* Homogeneous Mixture: A homogeneous mixture has a uniform composition throughout. This means that if you take a sample from any part of the mixture, it will have the same properties as any other sample.
* Heterogeneous Mixture: A heterogeneous mixture has a non-uniform composition. Different parts of the mixture will have different properties.
In the case of a bag of colored marbles:
* You can easily see different colored marbles, meaning they are not evenly distributed.
* If you take a handful of marbles from one part of the bag, it might have a different color distribution than a handful from another part.
Therefore, a bag of colored marbles is a heterogeneous mixture.
