Mineral and Power Resources Class 8 Questions and Answers Geography Chapter 3
Geography Class 8 Chapter 3 NCERT Textbook Questions and Answers
Question 1.
Answer the following questions :
(i) Name any three common minerals used by you every day.
(ii) What is an ore? Where are the ores of metallic minerals generally located?
(iii) Name two regions rich in natural gas resources.
(iv) Which sources of energy would you suggest for
(a) rural areas
(b) coastal areas
(c) Arid regions
(v) Give five ways in which you can save energy at home.
Answer:
(i) These common minerals used by us in day-to-day life are copper, iron and salt.
(ii) An ore is a rock from which minerals are extracted. Ores of metallic minerals are found usually in igneous and metamorphic rock formation.
(iii) Two regions in India rich in natural gas resources are Jaisalmer and Krishna- Godavari delta.
(iv) (a) For rural areas, solar energy, and wind energy are good options. In rural
areas there are no high-rise buildings to act as obstacle for sunlight or to break the momentum of speed.
(b) For coastal areas, wind energy and tidal energy are good choices.
(c) For arid region, solar energy and wind energy are possible.
(v) Five ways in which one can save energy at home are :
(a) Use of solar energy as much as possible.
(b) Use of biogas as cooling fuel.
(c) Using sun’s energy to dry clothes instead of electric dryers.
(d) Switching off fans and lights when not in use.
(e) Using pressure cookers for cooking.
Question 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 NOT a producer of mica?
(a) Jharkhand
(b) Karnataka
(c) Rajasthan
(d) Andhra Pradesh
Answer:
(b) Karnataka
(iii) Which one of the following is a leading producer of copper in the world?
(a) Bolivia
(b) Chile
(c) Ghana
(d) Zimbabwe
Answer:
(c) Ghana
(iv) Which one of the following practices will NOT conserve LPG in your kitchen.
(a) Soaking the dal for some time before cooking it.
(b) Cooking food in a pressure cooker.
(c) Keeping the vegetables chopped before lighting the gas for cooking.
(d) Cooking food in an open pan kept on low flame.
Answer:
(d) Cooking food in an open pan kept on low flame.
Question 3.
Give reasons.
(i) Environmental aspects must be carefully looked into before building huge dams.
(ii) Most industries are concentrated around coal mines.
(iii) Petroleum is referred to as “black gold”.
(iv) Quarrying can become a major environmental concern.
Answer:
(i) Building huge dams can cause destabilisation of the natural habitats of plants and animals living in the area. Before building dams these environmental issues should be looked into.
(ii) Presence of coal mines around industries reduces the cost of transportation and also ensures easy availability of fuel.
(iii) Petroleum is a very valuable fuel and thus regarded as ‘black gold’. Almost all vehicles run by the products of petroleum. Even sub-product of petroleum, kerosene, is also used for lighting and cooking.
(iv) After querrying, pils are not-covered and the land becomes a waste land. Hence, quarrying can become a major environment concern.
Question 4.
Distinguish between the followings.
(i) Conventional and non-conventional sources of energy.
(ii) Biogas and natural gas.
(iii) Ferrous and nonferrous minerals.
(iv) Metallic and non-metallic minerals.
Answer:
| Conventional sources of energy | Non-conventional sources of energy |
| 1. Power sources that have been in use for a long time. | 1. Power sources that have come into use recently due to the depleting conventional resources and growing aware- ness. |
| 2. Examples : Fossil feels and fire- wood. | 2. Examples : Solar energy, wind energy, etc. |
| Biogas | Natural Gas |
| 1. Obtained from the decomposition of organic waste. | 1. Obtained as a by-product from the extraction of petroleum. |
| 2. A renewable source of energy. | 2. A non-renewable source of energy. |
| 3. It is a non-convential source. | 3. It is a non-convential source. |
| Ferrous Minerals | Non-ferrous minerals |
| 1. Minerals that contain iron in them. | 1. Minerals that do not contain iron in their. |
| 2. They are magnetic in nature | 2. They are non-magnetic in nature |
| 3. Example : Iron ore | 3. Limestone : copper ore. |
| Metallic minerals | Non-metallic minerals |
| 1. Minerals containing metals in raw form. | 1. Minerals that do not contain metals. |
| 2. Examples : bauxite, iron ore | 2. Examples : Gypsum, limestone. |