Question

3. Differentiate between : (a) Mineral and ore (b) Metallic and Non-metallic minerals (c) Ferrous and non-ferrous minerals (d) Open cast mining and underground mining​

Answer 1

Answer:

Difference between:-

(a) Mineral and ore

Minerals

Minerals are naturally occurring inorganic solids with a crystalline structure and a definite range of chemical formula

Ore

Ores are concentrations of minerals in rock that are high enough to be economically extracted for use.

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(b) Metallic and Non-metallic minerals

Metallic Minerals

Metallic Minerals are minerals in which metal elements are present in their raw form.

Metallic minerals are good conductors of electricity as well as heat.

Non-metallic minerals

Non-metallic minerals do not contain any metal substances in them

Non-metallic minerals are basically good insulators of electricity and heat.

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(c) Ferrous and non-ferrous minerals

Ferrous

Ferrous weigh more.

Ferrous are good conductors of electricity

Ferrous are less resistant to corrosion.

non-ferrous

non-ferrous weigh less.

non ferrous are bad conductors of electricity.

non-ferrous are more resistant to corrosion.

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d) Open cast mining and underground mining

underground mining

The underground method is suitable for extraction of deeper coal seams,

Open cast mining

opencast method is suitable for shallow coal seams.

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Answer 2

Answer:

Explanation: a) minerals and  ores

Minerals

1. Minerals are naturally occuring chemical substances .
2. They are present in earths crusts and can be obtained by minning
3. They have very low percentage of metals  and metals cannot be easily extracted from minerals
4. Examples clay ( Al2O3 2SiO2·2H2O) is the mineral of Al..

Ores  

1. ​ ores minerals from which metals can be economically extracted economically
2. Minerals contains a large percentage of minerals
3. Example ; bauxite( Al2H2O4) is an ore of Al .

b) Ferrous and non-ferrous Minerals

Ferrous minerals

1. Ferrous metals are metals that contain iron and steel.
2. They have high tensile strength and durablity.
3. They also exibhit magnetic properties .
4. Examples ;  iron  , steel etc.

Non ferrous minerals

1. Non-ferrous metals are those metals that do not have iron or iron
2. They have high corrosion resistance.
3. They don't exhibhit magnetic properties .
4. Examples ; copper and zinc

c)  Open cast mining and underground mining.

Open cast mining

1. It is also known as surface mining.
2. In surface mining, the ore is accessed directly from the Earth's surface, and contact is maintained with the surface throughout the operation. .
3. open cast mining is easiest and cheapest way of mining.

Under ground mining

1. These are called shaft mines.
2. this is done with the help of tunnels going into the Earth, and does not occur on the surface..
3. this mining includes risky methods .