Tertiary explosives, also called blasting agents, are so insensitive to shock that they cannot be reliably detonated by practical quantities of primary explosive, and instead require an intermediate explosive booster of secondary explosive. Primary and secondary are the two distinct classifications of Explosives. An explosive booster acts as a bridge between a low energy Explosive and a low sensitivity (but typically high energy explosive Primary and secondary are the two distinct classifications of Explosives. These are primarily used in large-scale mining and construction operations, and in terrorism. Mining is the extraction of valuable Minerals or other geological materials from the earth usually (but not always from an Ore body In the fields of Architecture and Civil engineering, construction is a process that consists of the Building or assembling of Infrastructure Terrorism is the systematic use of terror especially as a means of coercion