Primary activities produce raw materials from earth...Secondary activities process the raw materials obtained from primary activities...
Primary activities do not depend on other activities...Secondary activities depends on primary activities...
Activities associated with the primary sector include agriculture (both subsistence and commercial), mining, forestry, farming, grazing, hunting and gathering, fishing, and quarrying.
Activities associated with the secondary sector include metal working and smelting, automobile production, textile production, chemical and engineering industries, aerospace manufacturing, energy utilities, engineering, breweries and bottlers, construction, and shipbuilding.