Here are two examples of how density becomes physically apparent in a mixture:

1. Oil and Water:

* Scenario: Everyone knows oil and water don't mix. When you pour them together, the oil floats on top of the water.

* Density: This happens because oil is less dense than water. The less dense oil will rise to the top, while the denser water sinks to the bottom. This difference in density makes their separation visually apparent.

2. Sand and Gravel:

* Scenario: Imagine a mixture of sand and gravel. If you shake the container, you'll notice the larger, denser gravel settles to the bottom, while the lighter, less dense sand stays on top.

* Density: The difference in density between the gravel and sand causes them to separate into layers when disturbed. This layering is a direct result of their differing densities.

Let me know if you would like other examples!