Mineral and Power Resources Test - 5

Early humans made a relatively wide variety of stones tools that were used for processing several of stone tools that were used for processing various plant and animals materials. Their tool kits included chopper, cleavers and hammers as well as flakes used as knives and scrapers. Stones have been used to make a wide variety of different tools throughout history, including arrowheads, spears points and querns. Stone tools may be made of either ground stone and a person who creates tools out of the latter is known as a flintknapper.

Thus, the correct option is B.

• Mining is extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits.

• Mining has the potential to shape and affect economies directly and indirectly. Mining brings employment, government revenues, and opportunities for economic growth and diversification.

Minerals are non-renewable resources. A non-renewable resource is the resource of a substance that is being used up more quickly than it can replace itself. Its supply is finite. Most fossil fuels, minerals, and metal ores are non-renewable resources. 

Gold is an example of a metallic mineral. As the name suggests, metallic minerals are the minerals that contain one or more metals. In general, they occur as mineral deposits and are a good conductor of heat and electricity, e.g. iron, copper, gold, bauxite, manganese, etc.

• Mining  is called a robber industry because valuable resources are taken from the earth and hence depriving earth from it's own resources 
  
• .These resources are not formed in a small time instead takes millions of years to replenish.
  
• This is because it is using up the earths resources, therefore in a very poetic sense 'robbing' the earth of its natural resources that will not be laid down again, at least not for an extremely long period of time
  

It is an important primary activity. It supports the industrial growth of a country.

•  Non-metallic minerals are those which do not yield new products on melting.
  
•  Coal, salt, clay, salt, sulfur, marble are some examples. These are generally associated with igneous/metamorphic rocks.
  
• Nitrate is a polyatomic ion with the molecular formula NO− 3 and a molecular mass of 62.0049 u.
  
• Examples of non-metallic minerals include potassium, phosphorus , nitrate,calcium, magnesium, sulphur, etc. 
  

 Lignocellulosic biomass is derived from wood remains i.e. plants and trees, as the wood is made of lignose and cellulose. It is recognised as a very valuable commodity.

• Minerals are non-renewable as they take tens of thousands to millions of years to form.