Question

What are minerals? write their mode of occurance. Why they are important to us?

Answer 1

Answer:

natural resources

Explanation:

needed for betterment of life

Answer 2

Minerals - Minerals are homogeneous substance which occurs naturally. Minerals are inorganic substances. Have definable internal structure.

Occurrence -

• Minerals are found beneath Earth's surface. They are found in compounds.
• They have a solid crystal structure. They comprises of one or more elements.
• Different minerals can be identified by their different physical and chemical properties.
• There are many varieties of minerals of different colours, lusture, density.
• The geologist characterise minerals by their chemical and physical properties.
• Igneous and metamorphic rocks - in veins there is smaller quantity and for larger quantity it is called lodes. Examples - Tin, Copper, Zinc, Lead.
• Sedimentary rocks - Minerals occurs in beds and layers. Examples - Coal, Iron ore, Gypsum, Potash, Salt, Sodium Salt are some that are found in beds and layers.
• Decomposition of the surface rocks - When there is decomposition of of surface rocks and there is removal of soluble constituents leaves a residual mass of weathered mineral that contain ore. Example - Bauxite.
• Alluvial deposits - Some minerals are also found in sands of valley floors and the base of hills. They are also called Placer Deposits. Examples - Gold, Tin, Silver, Platinum.

Importance of Minerals -

• The most things we consume are minerals. Even water contains minerals.
• Different valuable minerals are used for different development of the economic.
• The use of minerals minerals make our live comfortable.
• Minerals are responsible for the biological processes on Earth.

Types of Minerals -

• Metallic minerals - two types - (i) Ferrous - The mineral that contains Iron. Like, Iron ore, Manganese ore, Chromite, Nickel, Cobalt, Pyrite. (ii) Non - Ferrous - The mineral that contain metals other than iron. like, Gold, Copper, Silver, Bauxite, lead, Tin and Magnesium.
• Non - Metallic minerals - For example - Limestone, Potash, Mica, Gypsum, Petroleum, Coal.

Iron ore - The most important and basic mineral. It is the backbone of the country. It is used in various development process like construction of houses, dams, buildings etc.

1. Magnetite - the iron concentration is 70% which is the finest quality. It also has magnetic properties.
2. Hematite - The concentration of iron is 60% - 70%. It is very useful for industrial works.
3. Limonite - The concentration of iron is 40% to 60%.
4. Siderite - It contains 40% to 50% of iron.