Minerals

ICSE Class 6 Geography · Solutions for Goyal Brothers Prakashan Geography by Veena Bhargava Class 6 ICSE · 30 solved questions

Exercise
1Tick the right option

Iron ore with magnetic property

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magnetite

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State with the largest producer of iron ore

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Odisha

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It makes steel strong, removes impurities and makes it immune to rusting

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manganese

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The largest producer of manganese in the world is

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South Africa

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Kazakhistan is the largest producer of

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Uranium

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A radioactive material used in nuclear defence system and nuclear generation of electricity

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uranium

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Mexico is the largest producer of which mineral?

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Silver

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The mineral widely used for making alloy

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copper

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A form of underground mining using shafts

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Sub-surface mining

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Practice of mining a seam of mineral by first removing a long strip of overlying soil and rock

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strip mining

1Fill in the blanks

A mineral is naturally occurring chemical compound of ............... form.

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A mineral is naturally occurring chemical compound of crystalline form.

2Fill in the blanks

The largest producer of copper is ............... .

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The largest producer of copper is chile .

3Fill in the blanks

Minerals may be ............... or ............... .

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Minerals may be Metallic or Non-metallic .

4Fill in the blanks

Gold is a ............... metal.

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Gold is a precious metal.

5Fill in the blanks

Natural gas occurs in association with ............... .

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Natural gas occurs in association with petroleum .

1Explain the following terms in brief

Hard rock mining

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Hard rock mining refers to underground mining techniques that are used for extraction of hard minerals like metal ores. These are ores containing iron, copper, gold, silver etc.

2Explain the following terms in brief

Open pit mining

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Open pit mines are big pits made on the ground to extract minerals. It is used when deposits of commercially useful ore or rocks are found near the surface.

3Explain the following terms in brief

Mineral

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A mineral is an aggregate of two or more than two elements. A mineral has a definite chemical composition and is formed by inorganic process. Minerals may be metallic, Non-metallic or energy providing.

4Explain the following terms in brief

Mineral fuel

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Fossil Fuels or Mineral Oils or mineral fuel are the hydrocarbon fuel that we extract from the earth's crust. They are formed over millions of years from the fossils or remains of dead animals and plants that were buried under dirt and rocks. Heat from inside the earth and pressure from rocks changed these fossils into coal, oil and natural gas.

5Explain the following terms in brief

Ore

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Ores are minerals that have a high concentration of a certain element typically a metal, e.g. bauxite is the ore of aluminum.

1Differentiate between

Mineral and ore

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Sl.
No.		MineralOre
1.A mineral is an aggregate of two or more than two elements.Ores are minerals that have a high concentration of a certain element typically a metal.
2.All minerals are not ores.All ores are minerals.
3.Example: Iron, CopperExample: Bauxite, Magnetite
2Differentiate between

Metallic and Non-metallic minerals

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Sl.
No.		Metallic mineralsNon-metallic minerals
1.They are hard and show a metallic shine in their appearance.They have a non-metallic shine or lustre.
2.Metals in raw form are extracted from them.Do not contain extractable metals in their chemical composition.
3.They are ductile.They are non-ductile.
4.Metallic minerals are found in igneous rocks.Non-metallic minerals are found in sedimentary rocks.
3Differentiate between

Ferrous and non-ferrous minerals

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Sl.
No.		Ferrous mineralsNon-ferrous minerals
1.The minerals that contain iron are called ferrous minerals.The minerals that do not contain iron are called non-ferrous mineral.
2.They are magnetic.They are non-magnetic.
3.They are heavier.They are generally light weight.
4Differentiate between

Open cast mining and underground mining

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Sl.
No.		Open cast miningUnderground mining
1.Used to extract minerals that are present near the surface of earth.Used to extract minerals that are buried too deep.
2.Also known as open pit mining.Also known as sub-surface mining.
1Answer in brief

What is the need for conservation of mineral resources?

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The mineral resources are finite and non-renewable. It takes millions of years for the formation of minerals. Compared to the present rate of consumption, the replenishment rate of minerals is very slow. That is why, there is a need to conserve the mineral resources.

2Answer in brief

Give some uses of bauxite.

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Some uses of Bauxite are:

  1. It is the raw material for extraction of Aluminium.
  2. It is used for making aircrafts, ship and utensils.
  3. It is used in electrical industries.
  4. It is used in cement industry, soda cans, dishwashers.
3Answer in brief

What is iron ore used for?

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Main uses of iron ore are the following:

  1. Iron ore is used for extraction of iron which is further used for making pig iron, sponge iron and steel.
  2. Iron is used for construction of roads, railways, appliances, buildings, machines, tools and automobiles.
  3. Steel is used in a variety of other construction materials such as bolts, nails and screws.
  4. Other applications include ship building, pipeline transport, mining, furniture and armour like personal armour and vehicle armour.
4Answer in brief

Which is the largest producer of bauxite in the world?

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Jamaica is the largest producer of bauxite in the world.

5Answer in brief

State the importance of copper in the industrial development.

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Copper is in great demand in the industrial field because of its high ductility, and high thermal and electrical conductivity. Following are the important uses of copper:

  1. It is mainly used in electrical machinery, automobile industry, stainless steel and telephones.
  2. Copper is also used in railway equipment industry and other engineering works.
  3. The nickel-copper alloy (morel metal) is very tough and resists corrosion and is largely used as a material for construction in the chemical industry.
6Answer in brief

State any three uses of uranium.

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Three uses of uranium are:

  1. Nuclear defence system and nuclear generation of electricity.
  2. Nuclear medicine and x-ray machines
  3. Atomic dating and electronic instrument

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