NCERT Solutions Class 8 Social Science (Geography) Chapter 3 Mineral and Power Resources

NCERT Solutions Class 8 Social Science (Geography : Resource and Development)

The NCERT Solutions in English Language for Class 8 Social Science (Geography : Resource and Development) Chapter – 3 (Mineral and Power Resources) has been provided here to help the students in solving the questions from this exercise.

Geography (Resource and Development)

• Chapter – 1 — Resources
• Chapter – 2 — Land, Soil, Water, Natural Vegetation and Wildlife
• Chapter – 4 — Agriculture
• Chapter – 5 — Industries
• Chapter – 6 — Human Resources

Chapter – 3 (Mineral and Power Resources)

1. Answer the following questions.
(i) Name any three common minerals used by you every day.
Answer – Salt, petroleum and gold are the common minerals that are used by humans on a regular basis.

(ii) What is an ore? Where are the ores of metallic minerals generally located?
Answer – A rock from which a particular mineral can be profitably extracted is called an ore. The ores of metallic minerals are generally located in igneous and metamorphic rocks.

(iii) Name two regions rich in natural gas resources.
Answer – Russia and the United Kingdom are the major producers of natural gas.

(iv) Which sources of energy would you suggest for
(a) rural areas,
(b) coastal areas, and
(c) Arid regions?

Answer –
(a) In rural areas – biogas, solar energy.
(b) In coastal areas – wind power, petroleum and tidal power.
(c) In arid areas – geothermal power and solar energy.

(v) Give five ways in which you can save energy at home.
Answer – We can save energy at home by following the ways as mentioned below:

• Switching off the electrical appliances when not in use.
• Using pressure cooker to cook food.
• Promoting the use of solar energy.
• Covering the short distances using bicycles or by walking.
• Turning off the car’s engineat a red light .

2. Tick the correct answer.
(i) Which one of the following is NOT a characteristic of minerals?
(a) They are created by natural processes.
(b) They have a definite chemical composition.
(c) They are inexhaustible.
(d) Their distribution is uneven.
Answer – (c) They are inexhaustible

(ii) Which one of the following is a leading producer of copper in the world?
(a) Bolivia
(b) Ghana
(c) Zimbabwe
(d) Chile
Answer – (d) Chile

(iii) Which one of the following practices will NOT conserve LPG in your kitchen?
(a) Cooking food in an open pan, kept on a low flame.
(b) Soaking the dal for some time before cooking it.
(c) Cooking food in a pressure cooker.
(d) Keeping the vegetables chopped before lighting the gas for cooking.
Answer – (a) Cooking food in an open pan, kept on a low flame

3. Give reasons.
(i) Environmental aspects must be carefully looked into before building huge dams.
Answer – Construction of a huge dam creates large scale destruction of natural vegetation and wildlife in those areas, which get submerged. This is not good for the ecosystem. Hence, environmental aspects must be carefully looked into, before building huge dams.

(ii) Most industries are concentrated around coal mines.
Answer – Coal is an important source of energy, and hence most industries are located around coal mines.

(iii) Petroleum is referred to as “black gold”.
Answer – Petroleum is a thick black liquid and is a valuable resource for various industries. Hence, it is also known as “black gold”.

(iv) Quarrying can become a major environmental concern.
Answer – Quarrying creates many problems. Fine dust particles spread in the air around a quarrying site. Dust particles from the quarry can cause respiratory problems. Quarrying also destroys natural vegetation and, thus, the home of many wild animals.

4. Distinguish between the following.
(i) Conventional and non-conventional sources of energy
Answer – 

Answer – 

Answer – 

(iv) Metallic and non-metallic minerals
Answer –