Apartheid was a racist political policy in South Africa demanding segregation of the nation's white and non-white populations. During South African apartheid, more than three million black citizens were forced to move from their homes to segregated neighborhoods.
The layers of the atmosphere differ in temperature and density.
Vocabulary enriches expressions used to explain feelings evoked by our senses. This stimulates the brain to look for such details and creates sense of recognition and an eye for detail. :)