User:RamyaShanmugam.C

MINERALS A naturally occurring substance which has definite chemical composition in its substance are called minerals.First one cannot find directly the minerals.They find it as a ore.Then they extract the minerals from the ore.The ore we find is extracted from rocks.It has its own physical and chemical properties.The physical properties like color,quantity and its quality.The chemical properties like solubility.There are two major kinds of minerals, 1.Metallic minerals. 2.Non-metallic minerals. METALLIC MINERALS: A substance which we extract from ore contains metals are called metallic minerals.Based on its Iron content it has classified into two types.They are 1.Ferrous minerals. 2.Non-ferrous minerals. Ferrous minerals are the one which contains Iron content in it.For example,Aluminium, Bauxite etc..,Next, Non-Ferrous minerals which does not contain iron content in it.For example,Gold,Silver. NON-METALLIC MINERALS: A substance which we extract from ore does not contains metals are called Non-metallic minerals. The examples are like the fossil fuels can say that is Coal, petroleum and some of the natural gas.

EXTRACTIONS OF MINERALS: There are three main process of extracting the minerals.They are 1.Mining-It is the process of taking out minerals from the rock which are buried inside the earth.It is of two kinds open-cat and shaft mining.open caste is the process the minerals which are lie at shallow depths are taken out by using this process.Shaft mining is the process in which the minerals are like at great depth are taken out. 2.Drilling-Deep bores are inserted to taken out the minerlals that are present inside the earth.Like Drilling of oil from the offshore. 3.Quarrying-It is the process of taking out minerals that lie near the earth surface.