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.
self-efÂ·fiÂ·caÂ·cy. A person's estimate or personal judgment of his or her own ability to succeed in reaching a specific goal, for example, quitting smoking or losing weight, or a more general goal, for example, continuing to remain at a prescribed weight level.