Class 8 Geography Chapter 3 Extra Questions and Answers Mineral and Power Resources

Mineral and Power Resources Class 8 Geography Chapter 3 Extra Questions and Answers Social Science CBSE Pdf free download are part of Extra Questions for Class 8 Social Science. Here we have given NCERT Extra Questions for Class 8 Social Science SST Geography Chapter 3 Mineral and Power Resources.

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Class 8 Geography Chapter 3 Extra Questions and Answers Mineral and Power Resources

Mineral and Power Resources Class 8 Extra Questions and Answer Geography Chapter 3 Very Short Answers Type

Question 1.
What is a mineral?
Answer:
A naturally occurring substance that has a definite chemical composition is a mineral.

Question 2.
What is meant by a rock?
Answer:
A rock is an aggregate of one or more minerals but without definite composition of constituent of mineral.

Question 3.
Define open-cast mining.
Answer:
Minerals that lie at shallow depths are taken out by removing the surface layer; this is known as open- caste mining.

Question 4.
What does the term quarrying mean?
Answer:
Minerals that lie near the surface are simply dug out by the process known as quarrying.

Question 5.
Which country has no known mineral deposit in it?
Answer:
Switzerland has no known mineral deposit in it.

Question 6.
Name the two countries of Asia that have large iron ore deposits.
Answer:
China and India have large iron ore deposits.

Question 7.
How is salt obtained?
Answer:
Salt is obtained from seas, lakes and rocks.

Question 8.
Where are the oldest-rocks in world located in?
Answer:
The oldest rocks in the world are in western Australia.

Question 9.
Define Geothermal energy.
Answer:
Heat energy obtained from the earth is called geothermal energy.

Question 10.
What is Biogas?
Answer:
Organic waste such as dead plant and animal material and dung and kitchen waste can be converted into gaseous fuel called Biogas.

Question 11.
Name the greatest producer of Nuclear power.
Answer:
USA and Europe

Question 12.
Which type of energy is wind energy?
Answer:
Wind is an inexhaustible source of energy.

Question 13.
How are windmills used since times immemorial?
Answer:
Windmills have been used for grinding grain and lifting water since times immemorial.

Question 14.
Define Geothermal Energy.
Answer:
Heat energy obtained from Earth.

Question 15.
In which part of India there is a huge tidal mill farms?
Answer:
In the Gulf of Kachchh.

Question 16.
Where in India are the geothermal plants located?
Answer:
Manikaran in Himachal Pradesh and Puga Valley in Ladakh.

Question 17.
How is firewood widely used?
Answer:
It is widely used for cooking and heating.

Question 18.
What are the 2 main conventional sources of energy?
Answer:
Firewoods and fossil fuels.

Question 19.
Which is the most abundantly found fossil fuel?
Answer:
Coal is the most abundantly found fossil fuel.

Question 20.
What is thermal power?
Answer:
Electricity from coal is called thermal power.

Mineral and Power Resources Class 8 Extra Questions and Answer Geography Chapter 3 Short Answers Type

Question 1.
What are the uses of minerals?
Answer:
Minerals are used in many industries. Minerals which are used for gems are usually hard. These are then set in various styles of jewellery. Copper is another metal used in everything from coins to pipes, silicon used in computer industry is obtained from quartz. Aluminium obtained from its ore bauxite is used in automobiles and aeroplanes, bottling industry, buildings and even in kitchen cookware.

Question 2.
How is the distribution of iron placed in India?
Answer:
India has deposits of high-grade iron ore. The mineral is found mainly in Jharkhand, Odisha, Chhattisgarh, Madhya Pradesh, Goa, Maharashtra and Karnataka.

Question 3.
Name the major limestone producing states in India.
Answer:
Major limestone producing states in India are Bihar, Jharkhand, Odisha, Madhya Pradesh, Chhattisgarh, Rajasthan, Gujarat and Tamil Nadu.

Question 4.
What is coal and why is coal referred to as Buried Sunshine?
Answer:
Coal is the most abundantly found fossil fuel. It is used as a domestic fuel, in industries such as iron and steel, steam engines and to generate electricity. Electricity from coal is called Thermal Power.

The coal which we are using today was formed millions of years ago when giant ferns and swamps got buried under the layer of earth. Coal is therefore referred to as Buried Sunshine.

Question 5.
Define Tidal Energy and where was the first tidal energy station built?
Answer:
Energy generated from tides is called tidal energy. Tidal energy can be harnessed by building dams at narrow openings of the sea. During high tide the energy of the tides is used to turn the turbine installed in the dam to produce electricity. Russia, France and Gulf of Kachchh in India have huge tidal mill farms. The Ist tidal energy station was built in France.

Question 6.
How is petroleum found and what is petroleum and its derivatives known as and why?
Answer:
Petroleum is found between the layers of rocks and is derived from oil fields located in off shore and coastal areas. Then this is sent to refinery which processes the crude oil and produces a variety of products. Petroleum and its derivatives are called Black gold because they are valuable.

Mineral and Power Resources Class 8 Extra Questions and Answer Geography Chapter 3 Long Answers Type

Question 1.
Define mineral in brief and explain how they are formed without any human interference.
Answer:
A naturally occurring substance that has a definite chemical composition is a mineral. Minerals are not evenly distributed over space. They are concentrated in a particular area or rock formations. Some minerals are found in areas which are not easily accessible such as the Arctic ocean bed and Antarctica.

Minerals are formed in different types of geological environments, under varying conditions. They are created by natural processes without any human interference. They can be identified on the basis of their physical properties such as colour, density, hardness and chemical property such as solubility.

Question 2.
What is meant by Nuclear power? Explain the process how it is obtained. Also name the places of India where the nuclear power stations are located.
Answer:
Nuclear power is obtained from energy stored in the nuclei of atoms of naturally occurring radio active elements like uranium and thorium. These fuels undergo nuclear fission in nuclear reactors and emit power. The greatest producers of nuclear power are U.S.A and Europe. In India Rajasthan and Jharkhand have large deposits of Uranium.

Thorium is found in large quantities in the Monozite sands of Kerala. The nuclear power stations in India are located in Kalapakkam in Tamil Nadu, Tarapur in Maharashtra, Ranapratap Sagar near Kota in Rajasthan, Narora in U.P, and Kaiga in Karnataka.

Picture Based Questions Class 8 Geography Chapter 3 Mineral and Power Resources

Look at the picture given below and answer the following questions:
Class 8 Geography Chapter 3 Extra Questions and Answers Mineral and Power Resources 1
Question:
1. What is shown in the figure?
2. Define drilling.
Answer:
1. This picture shows shore drilling of oil.
2. Deep wells bored to take petroleum and natural gas out is called drilling.

Map Skills Class 8 Geography Chapter 3 Mineral and Power Resources

Question 1.
On an outline Map of the World mark the following:
(i) Countries of Asia with large iron deposits.
(ii) The countries in Europe that are leading producer of iron-ore in the world.
Answer:
(i) China and India
(ii) Russia, Swedan, Ukraine, France.
Class 8 Geography Chapter 3 Extra Questions and Answers Mineral and Power Resources 2

Question 2.
On an outline Map of India mark the following.
(i) Iron distribution in the states of India
(ii) Major Bauxite producing states.
Answer:
(i) Madhya Pradesh, Goa, Maharashtra and Karnataka.
(ii) Jharkhand, Odisha, Chhatisgarh, Madhya Pradesh, Gujarat, Maharashtra.
Class 8 Geography Chapter 3 Extra Questions and Answers Mineral and Power Resources 3