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] 1. a term used to denote an animal's own antigenic constituents, in contrast to ânonselfâ (which denotes foreign antigenic constituents). The self constituents are metabolized without antibody formation, whereas the antigens that are nonself are eliminated through the immune response mechanism.