All major steps in the water cycle are important, otherwise the cycle breaks down. Precipitation is one of the two basic steps in the water cycle: Water rises into the atmosphere (evaporation, transpiration, evapotranspiration, sublimation). Water falls from the atmosphere (precipitation).
1% of the Atmosphere includes water vapor, water vapor is a part of the water cycle. Water covers 71% of the earth, Hydrosphere, the water cycle includes water. Hydrosphere, atmosphere, lithosphere, and biosphere apex