Answer :
Final answer:
Italian salad dressing is the correct answer as it is a heterogeneous mixture due to its non-uniform composition; the oil and vinegar separate over time. Therefore, based on the options provided, the correct answer is: 1) Italian salad dressing.
Explanation:
The student's question relates to identifying types of mixtures. A heterogeneous mixture is one where the composition is not uniform throughout, which means you can usually see different components or phases within the mixture.
For instance, Italian salad dressing, which typically contains oil and vinegar along with various herbs and spices, is a classic example of a heterogeneous mixture because it exhibits different phases that can be observed visually; the oil and vinegar separate over time and do not remain uniformly mixed.
On the other hand, flat soda, Koolaid, and brass are all examples of homogeneous mixtures, where the composition is uniform and has a single phase. Whereas, items like white wine, mercury, ranch-style salad dressing, and table sugar are classified respectively as a homogeneous mixture (solution), an element, a heterogeneous mixture, and a compound.
