Here's why we don't talk about rocks forming from precipitation or evaporation in the traditional sense:

* Precipitation (rain, snow, hail) and evaporation are processes that involve water changing states, not directly forming rocks.

* Rocks form through geological processes, such as the cooling and solidification of magma (igneous rocks), the accumulation and cementation of sediments (sedimentary rocks), or the transformation of existing rocks under heat and pressure (metamorphic rocks).

However, precipitation and evaporation *do* play important roles in rock formation in these ways:

1. Sedimentary Rock Formation:

* Chemical Sedimentary Rocks: These rocks form from the precipitation of minerals from water solutions. Some examples include:

* Rock Salt (Halite): Forms from the evaporation of seawater, leaving behind dissolved salts.

* Gypsum: Forms when calcium sulfate precipitates from water.

* Limestone: Forms from the precipitation of calcium carbonate, often from the shells of marine organisms.

2. Weathering:

* Chemical Weathering: Precipitation (rainwater) can dissolve minerals in rocks, leading to their breakdown.

* Evaporation: Evaporation can leave behind minerals and salts that can contribute to weathering processes.

In summary: While precipitation and evaporation don't directly create rocks, they are crucial processes that contribute to the formation of some sedimentary rocks and the breakdown of existing rocks through weathering.