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Also Read: Land, Soil, Water, Natural Vegetation and Wildlife Resources

Minerals

Minerals are inorganic solids that exist naturally and have a specific chemical composition and atomic structure. All of their physical properties are derived from this foundation. A rock, for example, is a body of undifferentiated mineral stuff or a combination of one or more minerals. Granite, basalt, limestone, and sandstone are all common rocks.
Credits: IT Zem Solutions
What are Minerals? PPT

Physical Properties

Minerals are easy to identify based on their physical properties. They have unique physical characteristics. Here are their physical properties:

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  Hardness means resistance to scratch
  
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  Tenacity means resistance to impact
  
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  Specific gravity means relative density
  
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  Cleavage is the tendency of some crystals to split along planes of the weakest atomic bonding
  
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  Magnetism
  
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  Electrical Conductivity
  
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  Acid Reactivity
  

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Also Read: World Oceans Day

Classification of Minerals

Minerals are divided into two categories: primary and secondary. Minerals created by the volcanic process, which involves the cooling of liquid materials called magma, have been classified as primary, whereas those formed by other processes have been classified as secondary. Primary minerals such as olivine, anorthite, and hornblende, had entirely decomposed, and the byproducts recombined to create secondary minerals.

5. 
   Population in English-speaking countries
   

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Some numbers have been calculated by Wikipedia editors by mixing data from different sources; figures not attributed to sources and given with a date should be treated with caution.
Also note that in most sources, the results shown are of people who say that they can speak English, while that was not verified; which means the actual number of English speakers could be higher or lower (because of certain people who over- or underestimate their English skills).