Question

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Define the following :
a) Non-Mettalic minerals
b) Non-Ferrous Minerals
c) Mining
d) Quarrying
e) Drilling

Ch- Minerals and Power Resources
Class - 8
Geography

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Quality answers needed!
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Answer 1

Explanation:

Answer:

a) Non - metallic minerals

Ans : Non - mettalic minerals are the minerals that do not contain metals. Limestone, mica and gypsum are examples of such minerals.

b) Non - ferrous minerals

Ans : Non - ferrous minerals are those which does not contain iron but may contain some other metal such as gold, silver, copper or lead.

c) Mining

Ans : The process of taking out minerals from rocks buried under the earth's surface is called mining.

d) Quarrying

Ans : Minerals that lie near the surface are simply dug

out, by the process known as quarrying.

e) Drilling

Ans : Deep

wells are bored to take them out, this is called drilling.

More Information :

✪ A rock is an aggregate of one or

more minerals but without definite composition of constituent of mineral.

✪ There are majorly three types of rocks :

• Igneous Rocks
• Sedimentary Rocks
• Metamorphic Rocks

✪ Rocks from which minerals are mined

are known as ores.

✪ Although more than 2,800 types

of minerals have been identified,

only about 100 are considered ore minerals.

✪ A naturally occurring substance that has a definite chemical composition is a mineral.

✪ Minerals are further divided into :

• Metallic
• Non - Metallic

✪ Metallic minerals are also divided into :

• Ferrous
• Non - ferrous

✪ Switzerland has no known mineral

deposit in it.

Answer 2

a) Nonmetallic minerals are a special group of chemical elements from which no new product can be generated if they are melted. Nonmetallic minerals are, for example, sand, gravel, limestone, clay, and marble. ... The nonmetallic minerals industry is best known for the production of cement, ceramics, glass, and lime products.

b) In metallurgy, non-ferrous metals are metals or alloys that do not contain iron (Allotropes of iron ferrite) in appreciable amounts. Important non-ferrous metals include aluminium, copper, lead, nickel, tin, titanium and zinc, and alloys such as brass.

c) Mining is the process of taking out minerals from rocks buried under the earth's surface. The process of mining includes two methods: (a) Open cast mining, (b) Shaft mining. Deep wells are bored to take minerals out and this process is called drilling.

d) Quarrying: When minerals are simply dug out from near the surface, the process is called quarrying.

e) Drilling: When deep wells are bored to take out the mineral, the process is called drilling. Petroleum and natural gas are extracted by this method. Quarrying: When minerals are simply dug out from near the surface, the process is called quarrying.