Hail forms in a cumulonimbus cloud. When the air rises from the ground very quickly, the droplets then rise in currents of air, then go down. The droplets fall to a height with a temperature below 0 ° C and there they turn into ice floes. The ice floes fall down and are enveloped in water, colliding with drops that rise towards. With repeated ascent and descent, the piece of ice increases, sometimes reaching the size of a chicken egg and even an apple.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.