Which of the following is not a form of precipitation?

Water vapor is not considered a form of precipitation. In meteorological terms, precipitation refers specifically to any form of water – liquid or solid – that falls from the atmosphere and reaches the ground. This includes snow, sleet, and hail, all of which are forms of water that undergo condensation and fall due to gravity.

Water vapor, on the other hand, is the gaseous state of water and remains suspended in the atmosphere. It does not fall to the ground in the way that the other forms do. Instead, it must condense first to become liquid water or ice before it can be classified as precipitation. This distinction is important for understanding the water cycle and atmospheric processes.