Evapotranspiration occurs after heating up of water bodies and plants by the sun and releases moisture to the air. The invisible water vapor in the air condenses into visible water droplets or ice crystals. The air gets saturated with moisture, so it starts to condense into a liquid or solid form. As the water vapor goes higher in the sky, it reaches dew point, and the water droplets start to stick to things like dust or ice forming clouds.