Answer:
lower layer
Explanation:
Usually to identify halide ions in solution you use silver nitrate which readly react with Cl⁻, Br⁻ and I⁻ ions to form silver halide salts with different colors depending on the ion present in the solution.
Now, because the silver halide salts are insoluble in water and have a density higher that the water they will stay in the lower part of the test tube.
Mechanical weathering<span> breaks rocks into small pieces and fragments. Chemical </span>weathering<span> changes mineral structures inside of rocks. ... </span>Erosion<span>, which is also called mass wasting, happens when the </span>weathered<span> pieces of rock roll down-slope, along with another agent, such as in the case of a mud slide or moving ice floe.</span>