The study of the atmosphere and the processes that produceweather and climate is. 11. The science of is the study of the universe. Formation of Earth 12. The hypothesis suggests that the bodiesof our solar system evolved from an enormous rotating cloudcalled the solar nebula.
Definition of selfâpurification. 1  1 : purification by natural process selfâpurification of water. 2  2 : purification of oneself.
Water purification removes harmful contaminants from water. Filtration, which physically blocks or chemically removes contaminants, is a different purification technique from reverse osmosis, which filters water through a semi-permeable membrane, and distillation, which vaporizes water to separate it from the contaminants. Carbon filtration is a relatively cheap and efficient way of to purify water.