There it is considered, where it falls as rain, or in the colder months, sleet or snow. The runoff and ground water is evaporated and the cycle begins again. ... Orographic rain occurs from clouds from the topography of the land. Frontal rain is the most common and occurs when two air masses meet.
The biuret solution will turn from blue to purple when it is exposed to protein. The copper sulfate and potassium hydroxide cause the substance to become an alkaline.
