Examples of chemical change: During a chemical change, a new chemical composition and new properties are formed. Examples of chemical changes are: burning of wood, cooking of food, rusting of iron and souring of milk.
The Black Heritage Trail is a path in Boston, Massachusetts, winding through the Beacon Hill neighborhood and sites important in American black history.
For the novel, see Black Man. For other uses, see Black Woman. Black people is a term used in certain countries, often in socially based systems of racial classification or of ethnicity, to describe persons who are perceived to be dark-skinned compared to other given populations.