GSEB Class 10 Social Science Solutions Chapter 12 India Minerals and Energy Resources

I. Answer the following questions in detail.

Question 1. Give a detail information about mineral oil.
Answer: Mineral oil or petroleum is usually found in the layers of stratified rocks which contain substances like limestone and shale. This mineral oil was created when large amounts of animals and plants were buried under the ground in sedimentary rocks for thousands of years. The heat and pressure from the earth's inside converted this buried material into a thick liquid containing hydrocarbons, also known as mineral oil. When tectonic movement happened in the earth, this liquid was pushed up to higher layers of the earth. Some of this liquid also moved towards the seafloor.
In simple words: Mineral oil comes from ancient buried plants and animals in rock layers. Earth's heat and pressure turned them into oil. Tectonic shifts pushed this oil to higher rock levels or the seabed.

Exam Tip: When describing the formation of mineral oil, remember to mention the key elements: ancient organic matter (animals and vegetation), sedimentary rocks, heat, pressure, and long periods of time.

Question 2. State the remedies to preserve the minerals.
Answer: We can preserve minerals by using these remedies:
1. **Use of proper technology:** The amount of mineral waste can be lessened by using good and modern technology for extracting minerals.
2. **Recycling:** Scrap minerals such as iron, copper, aluminum, and tin should be recycled and used again.
3. **Alternate use of minerals:** We should find substitutes for minerals that are in short supply. For example, using solar energy instead of electricity, aluminum instead of copper, and CNG instead of petrol.
4. **Use of Non-conventional means:** We should increase the use of non-conventional sources like water, solar, wind, and biogas.
5. **Sustainability:** Efforts should be made to keep the environment clean so that future generations can enjoy a healthy planet. We should also strive for a pollution-free environment.
6. **Proper planning:** Once mineral reserves are properly estimated, planning needs to be done to use them effectively and efficiently. This step is very important to save and improve minerals.
In simple words: To save minerals, we need to use better technology to extract them, recycle old metal, find alternative materials, and use more renewable energy. Also, planning how we use them and keeping the environment clean are crucial steps.

Exam Tip: When listing remedies for mineral preservation, categorize your points (e.g., technology, recycling, alternatives) to make your answer structured and clear for better scores.

Question 3. Write about electricity in brief.
Answer: Electricity was first discovered during the industrial revolution. It is utilized for both industrial and domestic needs. In factories, electricity operates industries, machines, and transportation. At home, it helps run various gadgets like fans, televisions, radios, washing machines, refrigerators, and lights. There are mainly three kinds of electricity:
1. Thermal electricity
2. Hydroelectricity
3. Nuclear electricity
Coal, mineral oil, and natural gas are traditional ways to make electricity. Electricity made from flowing water in rivers and dams is called hydroelectricity, while electricity from atomic minerals is nuclear electricity. Minerals are scarce compared to how much we use them. So, it is very important to switch to non-conventional power sources like solar, wind, tidal, and geothermal energy to create electricity.
In simple words: Electricity, discovered during the industrial revolution, powers both factories and homes. It comes in three main forms: thermal, hydro, and nuclear. Because traditional mineral sources are limited, we need to switch to renewable energy like solar and wind power.

Exam Tip: When discussing electricity, ensure you cover its origin, primary uses (industrial and domestic), main types, and the importance of shifting to non-conventional sources for sustainability.

II. Answer the following questions pointwise.

Question 1. State the uses of limestone.
Answer: Limestone is a type of sedimentary rock that mostly contains calcium carbonate.
**Uses:**
1. Limestone is widely utilized in making cement.
2. It is also employed for melting iron, in the chemical industry, to make soda ash, soap, colors, and chemicals, in building construction, for making paper, and for refining sugar.
**Producing regions:**
1. Andhra Pradesh, Rajasthan, Madhya Pradesh, Gujarat, and Tamil Nadu together produce about 70% of India's limestone.
2. Chhattisgarh, Karnataka, Maharashtra, and Himachal Pradesh are other states that produce limestone.
3. Jamnagar, Kachchh, Amreli, and Kheda districts are major limestone-producing areas in Gujarat.
4. Limestone is also produced in Banaskantha, Mahesana, Sabarkantha, Vadodara Panchmahal, Bharuch, Narmada, Surat, Bhavnagar, and Rajkot.
5. The rocks found in Jamnagar district contain about 97% lime.
In simple words: Limestone is a rock made of calcium carbonate. It is used to make cement, refine sugar, and in the chemical industry. Major producing states in India include Andhra Pradesh, Rajasthan, and Gujarat.

Exam Tip: For questions asking for uses and producing regions, list them clearly with bullet points or numbered lists. Remember to mention key examples for each category.

Question 2. State about Mica.
Answer: India holds the top position in global mica production. Mica is resistant to fire and a poor conductor of electricity. Because of this, it is utilized in making electrical items like electric motors, dynamos, and radios. Mica is also found in Karnataka, West Bengal, and Tamil Nadu. India is a significant producer of a specific type of mica called muscovite mica.
**Producing regions:** Bihar, Jharkhand, Andhra Pradesh, and Rajasthan are major producers of mica in India.
In simple words: India is the biggest producer of mica, a fire-resistant and poor electricity conductor. It is used in electrical items and is found in states like Bihar and Rajasthan.

Exam Tip: When describing a mineral, remember to include its key properties (e.g., fire-resistant, bad conductor) and its main applications/uses, along with major producing regions.

Question 3. Mention the utility of Copper.
Answer: Copper has been used since early times; it was the first metal humans ever employed. Copper has excellent mixing properties, making it a very important metal. When copper is blended with tin, it forms bell metal. Similarly, when copper is blended with zinc, it becomes brass.
**Uses:** Copper conducts electricity well, so it is utilized in making electric wires, telephones, radios, and televisions. It is also employed in making coils for refrigerators and air conditioners. Copper also finds use in insecticides, explosives, colored glass, coins, and printing.
**Producing states:** Copper is mainly produced by Jharkhand, Madhya Pradesh, and Rajasthan. It is also found in Sikkim, Andhra Pradesh, Bihar, Karnataka, Maharashtra, Tamil Nadu, Himachal Pradesh, and Uttarakhand.
In simple words: Copper was the first metal used by humans, valued for its mixing properties to make alloys like brass and bell metal. It is an excellent electrical conductor, used in wires, electronics, and various industries. Jharkhand and Rajasthan are major producers in India.

Exam Tip: Detail the historical significance and key properties of copper. Then, clearly list its various applications, distinguishing between its use as a pure metal and in alloys.

Question 4. Write about the classification of minerals.
Answer: Based on their usage, minerals can be divided into metallic minerals, non-metallic minerals, and minerals utilized as energy resources.
In simple words: Minerals are classified by how we use them: as metals, non-metals, or energy sources.

Exam Tip: For classification questions, clearly state the basis of classification and then list each category without getting into too much detail unless asked.

III. Answer the following questions in brief.

Question 1. Modem age is known as mineral age. Why?
Answer: Minerals play a very important part in human progress. In the Stone Age, people used stones for hunting, but now they are traveling into space. The use of minerals has grown a lot since the industrial revolution. New inventions and developments keep happening in all fields over time. Every day, some new product or another appears in the world. All these inventions and discoveries help create products to meet demand. We use many gadgets, vehicles, and services now compared to the past. All of these require the use of minerals. Therefore, we can say that the modern age is truly the mineral age.
In simple words: The modern age is called the mineral age because minerals are essential for all our new inventions, technologies, gadgets, vehicles, and overall human progress, far more than in the past.

Exam Tip: To explain why the modern age is the "mineral age," connect the increased demand for technology and infrastructure directly to the widespread use and reliance on minerals in daily life.

Question 2. Why there is an increase in the usage of non-conventional energy today?
Answer: Coal and mineral oil are traditional but non-renewable energy sources. This means they are available in limited amounts and will eventually run out. To solve this issue, the world started looking for ways to save these resources and find alternative energy sources. As a result, people began using alternatives like wind energy, solar energy, biogas, tidal energy, and geothermal energy. All these are renewable energy sources, or inexhaustible energy resources. Many countries have already begun using these energy sources effectively. The US, Russia, France, Canada, Australia, Netherlands, and Japan are leading in this field. In 1981, India formed the 'Commission for Additional Sources of Energy (CASE)' to identify and use renewable energy sources. In Gujarat, the Gujarat Energy Development Agency (GEDA) is working in this area.
In simple words: The use of non-conventional energy is increasing because traditional sources like coal and oil are limited and will run out. Renewable sources like solar, wind, and biogas are inexhaustible and help address this problem.

Exam Tip: Emphasize the finite nature of conventional resources and the renewable, inexhaustible nature of non-conventional sources as the primary reasons for their increased usage.

Question 3. State the major places where iron is available.
Answer: **Iron producing states:** Karnataka produces the highest amount of iron ore in India. Iron is also obtained in good quantities from Odisha, Jharkhand, Chhattisgarh, and Andhra Pradesh. Iron ore is additionally found in Goa, Rajasthan, Tamil Nadu, Maharashtra, Madhya Pradesh, Kerala, Uttar Pradesh, and Assam.
In simple words: Karnataka produces the most iron ore in India, with other significant amounts coming from Odisha, Jharkhand, Chhattisgarh, and Andhra Pradesh. Many other states also have iron ore.

Exam Tip: When asked to list major producing regions, aim to name the top 2-3 states first, then mention other significant contributors to show comprehensive knowledge.

Question 4. Which states in India produces manganese?
Answer: Odisha, Karnataka, Madhya Pradesh, and Goa are the main manganese-producing states. Manganese is also obtained from Andhra Pradesh, Jharkhand, Rajasthan, and Gujarat.
In simple words: Odisha, Karnataka, Madhya Pradesh, and Goa are India's top manganese producers, with Andhra Pradesh, Jharkhand, Rajasthan, and Gujarat also contributing.

Exam Tip: Focus on accurately listing the primary states known for manganese production, as this is a direct factual recall question.

IV. Select the correct option for the following questions and write answer:

Question 1. A school in Palampur wants to show a bio-gas plant to its students of class 10th. Which nearest place will it select?
(a) Dhuvaran
(b) Dantiwada
(c) Maithan
(d) Undrel
Answer: (a) Dhuvaran
In simple words: If a school in Palampur needs to visit a nearby biogas plant for students, Dhuvaran is the correct and closest choice.

Exam Tip: For location-based questions, remember to associate specific energy resources or industrial sites with their primary geographical locations. This requires memorization.

Question 2. Some officers from Government of India want to visit Gujarat to survey the possibility of using the geothermal energy in future in Gujarat. Which place they should avoid?
(a) Tulsishyam
(b) Unai
(c) Saputara
(d) Lasundra
Answer: (c) Saputara
In simple words: Geothermal energy is possible in Tulsishyam, Unai, and Lasundra. Saputara does not have geothermal potential, so officers looking for it should skip that location.

Exam Tip: Be mindful of negative questions ("which should they avoid?"). Identify locations known for geothermal energy and select the one that is NOT associated with it.

Question 3. Match the correct pairs and find the answer:
(a) (a – 1), (b – 3), (c – 2), (d – 4)
(b) (a – 3), (a – 4), (c – 1), (d – 2)
(c) (a – 2), (a – 2), (c – 4), (d – 3)
Answer: (b) (a – 3), (a – 4), (c – 1), (d – 2)
In simple words: Based on the information for matching pairs, option (b) provides the correct combinations.

Exam Tip: When encountering "Match the following" questions with options that are the matched sets, carefully review each pairing within the options to determine the correct combination based on your knowledge.

I. Multiple Choice Questions (MCQs)

Question 1. Various stages of human development are shown below. Select the correct arrangement.
(1) Copper age
(2) Iron age
(3) Stone age
(4) Bronze age
(5) Atomic age
(a) 3, 1, 4, 2, 5
(b) 3, 4, 2, 1, 5
(c) 3, 5, 2, 4, 1
(d) 4, 2, 5, 3, 1 2.
Answer: (a) 3, 1, 4, 2, 5
In simple words: The correct order of human development stages is Stone Age first, then Copper Age, followed by Bronze Age, Iron Age, and finally the Atomic Age.

Exam Tip: For sequence-based questions, arrange the events or stages chronologically from earliest to latest. This often tests historical or developmental knowledge.

Question 2. Which of the following is not included in the minerals obtained from metamorphic rocks?
(a) Diamond
(b) Salt
(c) Marble
(d) Platinum
Answer: (d) Platinum
In simple words: Diamond, salt, and marble can all be found in metamorphic rocks. Platinum is not a mineral typically obtained from metamorphic rocks.

Exam Tip: Familiarize yourself with the types of rocks (igneous, sedimentary, metamorphic) and the minerals commonly associated with each. Pay attention to "not included" in the question.

Question 3. Which of the following are non-metallic minerals?
(a) Mica, Gypsum, Sulphur, Diamond
(b) Iron, Copper, Gold, Silver
(c) Chromium, Manganese, Tungsten
(d) Magnesium, Bauxite, Titanium
Answer: (a) Mica, Gypsum, Sulphur, Diamond
In simple words: From the given choices, mica, gypsum, sulphur, and diamond are all non-metallic minerals. The other options list metallic minerals.

Exam Tip: Distinguish clearly between metallic and non-metallic minerals. Metallic minerals typically have luster, conduct electricity and heat, and are malleable, while non-metallic minerals lack these properties.

Question 4. Which of the following pairs is not correct?
(a) Non-metallic mineral: Asbestos
(b) Metallic mineral: Natural gas
(c) Light metallic mineral: Bauxite
(d) Precious metallic mineral: Platinum
Answer: (b) Metallic mineral: Natural gas
In simple words: Natural gas is not a metallic mineral; it is a gaseous fuel. The other pairs correctly identify asbestos as non-metallic, bauxite as a light metallic mineral, and platinum as a precious metallic mineral.

Exam Tip: Carefully read "not correct" in the question. Analyze each pair, identifying the type of mineral and whether it correctly matches the given example. Natural gas is an energy resource, not a metallic mineral.

Question 5. Precious metallic minerals: Gold, Silver, Non-metallic minerals: ....................
(a) Chromium, Tungsten
(b) Zinc, Nickel
(c) Fluorspar, Limestone
(d) Magnesium, Titanium
Answer: (c) Fluorspar, Limestone
In simple words: The question asks to complete the list of non-metallic minerals following the pattern of precious metallic minerals. Fluorspar and limestone are both examples of non-metallic minerals.

Exam Tip: For fill-in-the-blank type MCQs, ensure your chosen option fits the category and pattern established by the preceding examples in the question.

Question 6. Minerals and their states are shown below. What can be at the place of question mark?
(1) Iron – Karnataka
(2) Manganese – Odisha
(3) Copper – Jharkhand
(4) Mica ?
(a) Meghalaya
(b) Haryana
(c) Himachal Pradesh
(d) Bihar
Answer: (d) Bihar
In simple words: Based on the common producing states for mica in India, Bihar is a significant producer, making it the correct answer for the missing state.

Exam Tip: Memorize the primary producing states for important minerals. This type of question tests direct recall of geographical distribution of resources.

Question 7. Which of the following statements is correct for Bauxite?
(a) Bauxite is the main ore from which aluminum is obtained.
(b) Bauxite is very light in weight, strong, durable, good conductor of electricity, rust-free and easily ductile.
(c) It is used in making utensils.
(d) All of the options
Answer: (d) All of the options
In simple words: Bauxite is the ore for aluminum and has beneficial properties like being light, strong, and a good electrical conductor. It is also used to make utensils. All these statements are true about bauxite.

Exam Tip: When "All of the options" is an answer choice, evaluate each individual option. If all seem correct, then "All of the options" is likely the right answer.

Question 8. Identify main manganese producing states.
(a) Odisha, Karnataka, Madhya Pradesh, Maharashtra, Goa
(b) Jharkhand, Madhya Pradesh, Rajasthan, Sikkim, Andhra Pradesh
(c) Odisha, Chhattisgarh, Maharashtra, Jharkhand, Gujarat
(d) Bihar, Jharkhand, Andhra Pradesh, Rajasthan, Karnataka
Answer: (a) Odisha, Karnataka, Madhya Pradesh, Maharashtra, Goa
In simple words: Odisha, Karnataka, Madhya Pradesh, Maharashtra, and Goa are recognized as the primary states in India that produce manganese.

Exam Tip: For questions asking for main producing states, focus on the most prominent ones first. A comprehensive list shows a strong understanding of resource geography.

Question 9. Identify me: Who am I?
(1) I am known as fire resistant and a bad conductor of electricity.
(2) I am used in making of aeroplane,
(a) Copper
(b) Mica
(c) Bauxite
(d) Lead
Answer: (b) Mica
In simple words: Mica is known for being fire resistant and a poor conductor of electricity, which matches the first clue perfectly.

Exam Tip: When a question has multiple clues, identify the strongest and most unique characteristics that point to a single answer. In this case, "fire resistant and a bad conductor of electricity" is a strong indicator for mica.

Question 10. What is the similarity among copper, bauxite and lead?
(a) All are light metallic minerals.
(b) All are heavy metallic minerals.
(c) All are exported by India.
(d) All are used to make electric wires.
Answer: (d) All are used to make electric wires.
In simple words: Copper, bauxite (for aluminum), and lead all have uses related to electric wires, which is a common function among them.

Exam Tip: For "similarity" questions, look for shared applications or properties among the listed items. Even if some uses are more primary than others, identify any common link that fits the given options.

II. Very Short Answer Type Questions

Question 1. What has played a large role in the human progress?
Answer: Mineral resources have played a significant role in human progress.
In simple words: Mineral resources have greatly helped human progress.

Exam Tip: For short answer questions, directly address the query with a concise and accurate statement. Focus on the key concept asked.

Question 2. In how many divisions in the human evolution process divided?
Answer: The human evolution process is divided into the following stages:
1. Stone age
2. Copper age
3. Bronze age
4. Iron age
5. Atomic age
In simple words: Human evolution is split into five main periods: Stone, Copper, Bronze, Iron, and Atomic ages.

Exam Tip: When listing divisions or stages, ensure they are presented in a clear, ordered format (e.g., a numbered list) as shown in the answer.

Question 3. By which other name is modem age known as?
Answer: The modern age is also known as the atomic age.
In simple words: The current era is also called the atomic age.

Exam Tip: For naming or identification questions, provide the alternative name directly and concisely without extra explanation.

Question 4. What is considered to be the backbone of economic development of any nation?
Answer: Minerals are considered the foundation of any nation's economic development.
In simple words: Minerals are seen as essential for a country's economic growth.

Exam Tip: Highlight the direct relationship between minerals and economic development. Using terms like "backbone" or "foundation" accurately reflects the question's intent.

Question 5. Give the examples of solid, liquid and gaseous minerals.
Answer:
* Solid minerals: Iron, manganese, silver, etc.
* Liquid minerals: Mercury, petroleum, etc.
* Gaseous minerals: Natural gas.
In simple words: Solid minerals include iron and manganese, liquid minerals are mercury and petroleum, and natural gas is a gaseous mineral.

Exam Tip: When asked for examples, provide a few distinct ones for each category. Using bullet points or separate lines for each category ensures clarity.

Question 6. On which things if the availability of type of minerals in the interior of the earth depend upon?
Answer: The type of minerals available from the earth's interior depends on how the earth's crust originally formed.
In simple words: What kinds of minerals are in the earth depends on how the earth's outer layer was made long ago.

Exam Tip: Focus on the geological aspect—the formation of the earth's crust—as the primary factor determining mineral availability.

Question 7. Mention the uses of iron.
Answer: Iron is employed in making everything from tiny pins to huge machines, motorcars, trucks, ships, railway tracks, bridges, buildings, and weapons.
In simple words: Iron is used to make a vast range of things, from small pins to large machines, vehicles, and buildings.

Exam Tip: When listing uses, provide a diverse range of examples that highlight the versatility of the material, from everyday items to heavy industry.

Question 8. How is cast iron obtained?
Answer: We obtain cast iron by taking away carbon from pig iron.
In simple words: Cast iron is made by removing carbon from pig iron.

Exam Tip: For process-related questions, explain the key step or transformation clearly and simply.

Question 9. Mention the types of iron ore found in India.
Answer: The types of iron ore found in India are:
1. Hematite
2. Magnetite
3. Limonite
4. Siderite
In simple words: India has four main types of iron ore: Hematite, Magnetite, Limonite, and Siderite.

Exam Tip: When listing types of ores, ensure you name them accurately. A numbered list is ideal for clarity.

Question 10. Mention the main use of manganese.
Answer: Manganese is primarily used in making steel from iron.
In simple words: Manganese's main use is in creating steel from iron.

Exam Tip: Identify the most significant application when asked for the "main use" of a mineral.

Question 11. Which characteristics do the rails and rods have when manganese is mixed with steel?
Answer: When manganese is mixed with steel, the rails and rods become more flexible and strong.
In simple words: Adding manganese to steel makes railway tracks and rods bendier and tougher.

Exam Tip: Focus on the specific properties (flexible, strong) that manganese imparts to steel when answering about its effect on materials like rails and rods.

Question 12. How are bell metal and brass made?
Answer: Bell metal is formed when tin is blended with copper. Brass is created when zinc is blended with copper.
In simple words: Bell metal is made by mixing tin and copper, while brass is made by mixing zinc and copper.

Exam Tip: Clearly state the components for each alloy. Precision in naming the metals involved is key for this type of question.

Question 13. Which is the largest mica producing country in the world?
Answer: India is the largest mica-producing country globally.
In simple words: India produces the most mica worldwide.

Exam Tip: For "largest producing country" questions, a direct and accurate statement of the country is sufficient.

Question 14. Mention the characteristics and uses of mica.
Answer: Mica is fire-resistant and a poor conductor of electricity. Because of this, it is employed in making electric motors, dynamos, radios, telephones, motorcars, and airplanes.
In simple words: Mica resists fire and doesn't conduct electricity well, so it's used in making electric motors, radios, and vehicles.

Exam Tip: Combine the key properties (fire resistance, poor conductivity) with relevant applications (electrical devices, vehicles) to provide a complete answer.

Question 15. Which type of mica is found in India in large quantity?
Answer: Muscovite type of mica is found in India in large amounts.
In simple words: India has a lot of muscovite mica.

Exam Tip: Specific types of minerals are important details. Ensure you recall the correct name of the mica type found abundantly in India.

Question 16. What is the ore of lead called?
Answer: Lead is called Galena.
In simple words: The ore from which lead is extracted is named Galena.

Exam Tip: Remember the common names of ores for important metals. This is a direct recall question.

Question 17. Mention the characteristics of lead.
Answer: Lead is soft and heavy in weight.
In simple words: Lead is a soft and heavy metal.

Exam Tip: For characteristics, list distinct physical properties. Keep it concise for a short answer.

Question 18. Mention the lime content in the rocks found in Jamnagar district.
Answer: The rocks in Jamnagar district contain about 97% lime content.
In simple words: Rocks in Jamnagar district have roughly 97% lime.

Exam Tip: Be precise with numerical data like percentages, as they are specific factual details that examiners look for.

Question 19. What keeps the industries and the economy throbbing?
Answer: Energy resources keep industries and the economy active and functional.
In simple words: Energy resources are what keep businesses and the economy running smoothly.

Exam Tip: Connect energy resources directly to their vital role in driving economic and industrial activities for a complete answer.

Question 20. Which minerals are energy resources?
Answer: Coal, mineral oil, natural gas, and atomic minerals are energy resources.
In simple words: Coal, mineral oil, natural gas, and atomic minerals are all sources of energy.

Exam Tip: List the primary examples of minerals that are classified as energy resources directly.

Question 21. Give examples of non-conventional energy resources.
Answer: Hydroenergy, wind energy, solar energy, bio-gas, geothermal energy, and tidal energy are non-conventional energy resources.
In simple words: Examples of non-conventional energy are hydro, wind, solar, bio-gas, geothermal, and tidal power.

Exam Tip: Provide a diverse list of examples to show a broad understanding of non-conventional (renewable) energy sources.

Question 22. Due to which invention, the use of coal increased?
Answer: The use of coal grew due to the invention of the steam engine.
In simple words: The steam engine's invention led to more coal being used.

Exam Tip: Link the invention directly to its impact on coal usage, highlighting the cause-and-effect relationship.

Question 23. Which by-products are obtained from coal?
Answer: By-products such as coal-tar, ammonia gas, benzoyl, and crude oil are obtained from coal.
In simple words: Coal-tar, ammonia gas, benzoyl, and crude oil are some things made from coal.

Exam Tip: List specific examples of by-products. This demonstrates knowledge of coal's industrial derivatives.

Question 24. From which type of rocks do we get coal?
Answer: We get coal from stratified rocks.
In simple words: Coal comes from stratified rocks.

Exam Tip: Identify the specific geological formation (stratified rocks) associated with coal extraction.

Question 25. From which type of rocks mineral oil is found?
Answer: Mineral oil is found in stratified/sedimentary rocks containing limestone, shale, etc.
In simple words: Mineral oil is found in stratified or sedimentary rocks that contain materials like limestone and shale.

Exam Tip: Differentiate between the general rock type (stratified/sedimentary) and the specific components (limestone, shale) often found where mineral oil is present.

Question 26. When and where was the first oil-well was dug in India?
Answer: The first oil well in India was dug in Assam in 1866 AD.
In simple words: India's first oil well was dug in Assam in 1866.

Exam Tip: Be precise with historical dates and locations for such factual questions. Both "when" and "where" need to be addressed.

Question 27. Where is the world's largest oil refinery located?
Answer: The world's largest oil refinery is located in Jamnagar, Gujarat (Reliance).
In simple words: The biggest oil refinery in the world is in Jamnagar, Gujarat, owned by Reliance.

Exam Tip: Provide the specific location and, if relevant, the company name when identifying the world's largest facilities.

Question 28. Which organization was established for the development of non-conventional energy resources? When?
Answer: The Commission for Additional Sources of Energy (CASE) was established in 1981 AD for the development of non-conventional energy resources in India.
In simple words: CASE was created in 1981 to help develop non-conventional energy in India.

Exam Tip: Remember the full name and acronym of the organization, along with its founding year and purpose, as it covers both "which" and "when".

Question 29. Which organization of Gujarat is working for the development of non- conventional energy resources?
Answer: The Gujarat Energy Development Agency (GEDA) is working for the development of non-conventional energy resources in Gujarat.
In simple words: GEDA is the Gujarat organization focused on developing non-conventional energy.

Exam Tip: Distinguish between national and state-level organizations, as the question specifically asks for an organization in Gujarat.

Question 30. What is considered to be the main source of energy on the earth?
Answer: The Sun is considered the main source of energy on Earth.
In simple words: The Sun is Earth's primary energy source.

Exam Tip: This is a fundamental concept. State the answer clearly and directly.

Question 31. Which state gets maximum solar energy in India?
Answer: Gujarat gets the highest amount of solar energy in India.
In simple words: Gujarat receives the most solar energy in India.

Exam Tip: Identify the specific state that leads in a particular renewable energy aspect, as these are often key facts in resource chapters.

Question 32. Where has GEDA established a solar cold storage with a capacity of 10 tonnes?
Answer: GEDA has established a solar cold storage with a capacity of 10 tonnes near Chhani (Vadodara).
In simple words: GEDA set up a 10-tonne solar cold storage facility near Chhani in Vadodara.

Exam Tip: For specific project-related questions, include the name of the agency, the type of project, its capacity, and the exact location for full marks.

Question 35. Where are wind farms located in Gujarat?
Answer: In Gujarat, wind farms can be found in Lamba village close to Jamnagar, and along the sea-coast near Mandavi in Kutch.
In simple words: Wind farms in Gujarat are at Lamba village near Jamnagar and Mandavi in Kutch by the sea.

Exam Tip: Remember specific locations like Lamba village and Mandavi, and relate them to coastal areas for wind energy.

Question 36. Where do we find wind mills in Gujarat to generate electricity?
Answer: Windmills that generate electricity in Gujarat are located in districts such as Devbhoomi Dwarka, Jamnagar, Rajkot, and Porbandar.
In simple words: In Gujarat, windmills for power are in Devbhoomi Dwarka, Jamnagar, Rajkot, and Porbandar areas.

Exam Tip: List key districts where windmills are present for electricity production in Gujarat.

Question 37. Which two energy resources can change the traditional lifestyle of villages of India?
Answer: Solar energy and biogas possess the ability to alter the traditional way of life in Indian villages.
In simple words: Solar power and biogas can change how people traditionally live in Indian villages.

Exam Tip: Focus on how these renewable energy sources bring modernization and new amenities to rural areas.

Question 38. Name the states which rank first and second in the production of biogas in India.
Answer: Uttar Pradesh holds the top position, and Gujarat secures the second spot, in the output of biogas across India.
In simple words: Uttar Pradesh is first and Gujarat is second in India for making biogas.

Exam Tip: Recall the top states for biogas production in India, noting their respective ranks.

Question 39. Where has the largest bio-gas plant been installed which runs on collective basis?
Answer: The biggest biogas plant, operating on a collective basis, was set up at Methan, close to Siddhpur in Gujarat.
In simple words: The largest biogas plant that runs together with a community is in Methan, near Siddhpur, Gujarat.

Exam Tip: Note the location and operational model (collective basis) of India's largest biogas plant.

Question 40. Which country started the project to generate electricity with the help of tides and ebbs? When?
Answer: France initiated the endeavor to produce electricity using the force of tides and ebbs in 1910 AD.
In simple words: France began a project in 1910 AD to make electricity from tides and ebbs.

Exam Tip: Remember the first country and the year for tidal energy generation projects.

III. Short Answer Type Questions

Question 1. Iron is one of the most important minerals of the world. Give reason.
Answer: Iron serves as the fundamental mineral or essential metal for the industrial growth of the present world. It is among the most frequently utilized minerals globally. People use it to create items from tiny pins to enormous machines, vehicles, trucks, ships, railroads, bridges, structures, and armaments. Iron is inexpensive, sturdy, and long-lasting, and you can find it in nearly all countries. Furthermore, it readily blends with other minerals to form new compounds. Due to its plentiful supply, widespread application, and simple blending with other minerals, it is viewed as a highly vital mineral.
In simple words: Iron is a key mineral for modern industry, used widely for everything from small pins to big machines. It's cheap, strong, lasts long, and mixes well with other minerals, making it very important.

Exam Tip: When explaining iron's importance, highlight its role as a base metal, its versatility in uses, and its properties like strength and availability.

Question 2. Write the short notes on copper.
Answer: Copper has been in use since ancient times. Indeed, it was the initial metal employed by humans. It possesses excellent blending properties, making it a very valuable metal. When copper combines with tin, it forms bell metal. Likewise, when copper mixes with zinc, it transforms into brass. Uses include: Copper conducts electricity well, so people use it for making electrical wires, phones, radios, televisions, and more. It also helps create coils for refrigerators and air conditioners. Additionally, copper finds use in insecticides, explosives, tinted glass, coins, and the printing industry.
In simple words: Copper has been used since ancient times and was the first metal humans used. It mixes well with other metals to make alloys like brass and bell metal. It's a great conductor of electricity, used in wires, electronics, and even coins.

Exam Tip: Describe copper's historical significance, its alloying properties, and its key uses, especially its electrical conductivity.

Question 3. Write a short note on lead.
Answer: Lead is derived from its ore, known as galena. It feels soft but is heavy. People use it to create alloys, electrical wires, pigments, weapons, glass, rubber, and storage batteries. India generates a good amount of lead, yet it cannot fulfill its own requirements. Therefore, India brings in lead from other countries. Producing areas include: Rajasthan, Andhra Pradesh, and Tamil Nadu are primary states that produce lead. You can also find lead in West Bengal, Madhya Pradesh, Uttar Pradesh, Odisha, Maharashtra, Meghalaya, and Sikkim.
In simple words: Lead comes from galena ore, is soft but heavy, and is used for things like alloys, wires, and batteries. India makes a lot of lead but still needs to import more. Rajasthan, Andhra Pradesh, and Tamil Nadu are big producers.

Exam Tip: Explain lead's source (galena), properties (soft, heavy), various uses, and India's production and import status.

Question 4. How can we classify energy resources?
Answer: Energy resources are generally categorized into conventional (also known as commercial) and non-conventional (or non-commercial) types. Conventional energy includes resources such as coal, mineral oil, natural gas, and atomic minerals, which are seen as traditional, non-renewable, or commercial sources. These resources help produce electricity. Examples of non-commercial conventional energy also include peat coal, firewood, and animal waste. Non-conventional energy refers to sources like hydro-energy, wind energy, solar energy, biogas, geothermal energy, and tidal energy, which are considered modern, renewable, or non-commercial resources.
In simple words: We can group energy sources into conventional (like coal and oil) and non-conventional (like solar and wind). Conventional sources are often non-renewable and used commercially, while non-conventional ones are renewable and include hydro, wind, and solar power.

Exam Tip: Clearly distinguish between conventional (commercial, often non-renewable like fossil fuels) and non-conventional (non-commercial, often renewable like solar/wind) energy resources with examples for each.

Question 5. How was coal formed? State the uses of coal.
Answer: Millions of years ago, the Earth was blanketed by dense plant life. Tectonic shifts within the planet’s crust buried this plant matter deep inside. Over countless millennia, the heat and pressure within the Earth's inner parts caused the carbon-rich trees and some animals to undergo slow burning. This process changed the plant life into coal. Coal helps power trains and steamboats. It also generates electricity in thermal power stations and serves as a cooking fuel. Furthermore, people use coal to create coal-tar, ammonia gas, benzoyl, and crude oil.
In simple words: Coal formed millions of years ago when thick plants were buried by earth movements, and heat and pressure turned them into coal. It's used for trains, electricity, cooking, and making things like coal-tar and crude oil.

Exam Tip: Focus on the geological process of coal formation (vegetation, burial, heat, pressure) and list its primary uses, including energy generation and by-products.

Question 6. How is mineral oil (petroleum) formed?
Answer: Mineral oil, or petroleum, is present in layers of stratified rocks that hold materials like limestone and shale. This oil came into being when vast amounts of ancient animals and plants were covered beneath the Earth, within sedimentary rocks, for many thousands of years. The warmth and pressure deep inside the Earth transformed this buried material into a thick liquid made of hydrocarbons, which is mineral oil. As tectonic shifts happened, this liquid was forced upward to higher rock layers, and some even moved towards the ocean floor.
In simple words: Mineral oil forms in stratified rocks like limestone and shale from old plants and animals buried for thousands of years. Heat and pressure turn them into liquid hydrocarbons. Earth movements push this oil upwards or towards the seafloor.

Exam Tip: Explain the origin of mineral oil from buried organic matter in sedimentary rocks, the role of heat and pressure, and its eventual migration.

Question 7. When was oil first found in India and in Gujarat? Today, how are the oil zones divided?
Answer: India's initial oil well was drilled in Assam in 1766. In Gujarat, oil was first discovered at Lunej in Kheda district during 1958. The country's oil fields, where petroleum is taken out, are grouped into five main areas:
1. Northeast
2. Gujarat
3. Bombay High
4. Eastern Coast and
5. Oil fields of Rajasthan.
In simple words: India's first oil well was in Assam in 1766; Gujarat found oil in Lunej in 1958. India's oil regions are split into five zones: Northeast, Gujarat, Bombay High, Eastern Coast, and Rajasthan.

Exam Tip: Remember the first oil discovery in India (Assam, 1766), Gujarat (Lunej, 1958), and list the five main oil-producing regions.

Question 8. Write a short note on natural gas.
Answer: Natural gas is collected from mineral oil deposits. It offers a more affordable form of energy. Additionally, it does not lead to pollution. When compressed, it becomes CNG (Compressed Natural Gas) and is utilized as household cooking fuel and for powering vehicles such as cars. This gas is located in the Khambhat basin, Kaveri basin, and Jaisalmer (Rajasthan). Gujarat's Ankleshwar region is known for having the biggest natural gas reserves.
In simple words: Natural gas comes from mineral oil, is cheaper, and doesn't pollute. It's used as CNG for cars and homes. You can find it in Khambhat, Kaveri, and Jaisalmer, with Ankleshwar having the biggest reserves.

Exam Tip: Note the origin of natural gas, its advantages (cheap, non-polluting), its use as CNG, and major discovery locations, especially Ankleshwar.

Question 9. Write a short note on solar energy.
Answer: Solar energy: The sun represents the primary source of energy on our planet. It shines for most days of the year. Life on Earth thrives because of solar energy. People have discovered how to harness solar power and utilize it in various ways. India has also advanced significantly in solar energy solutions. The country employs solar cookers for preparing food, solar heaters for warming water, and solar panels for producing electricity. Solar energy in Gujarat: The Gujarat Energy Development Agency (GEDA) has set up a solar cold storage facility with a 10-tonne capacity near Chhani (Vadodara). A solar power plant was constructed at Madhopur, close to Bhuj in Gujarat, specifically for converting salty ocean water into fresh drinking water. India, including Gujarat, uses solar panels to light up village streets that lack electricity. These panels also assist in watering fields and powering televisions.
In simple words: Solar energy comes from the sun and is vital for life on Earth. India uses solar cookers, heaters, and panels for electricity. Gujarat has a solar cold storage near Chhani and a desalination plant near Bhuj, plus uses solar panels for village streetlights and farm irrigation.

Exam Tip: Explain solar energy's importance, its various uses in India (cookers, heaters, panels), and specific projects in Gujarat like cold storage and desalination.

Question 10. Write a short note on wind energy.
Answer: The sun heats various parts of the Earth unevenly. This results in areas of low air pressure in some locations and high pressure in others. Wind develops because of these differences in air pressure. India employs wind to operate windmills and create energy. The country has set up many windmills along its coastlines and in open areas. Currently, India ranks as the fifth nation globally in generating power from wind. States such as Gujarat, Tamil Nadu, Maharashtra, Andhra Pradesh, Odisha, Karnataka, Madhya Pradesh, and Kerala generate wind energy. In Gujarat, wind power is produced at wind farms in Lambha village near Jamnagar and along the sea coast near Mandvi in Kachchh. Windmills situated in Devbhumi Dwarka, Jamnagar, Rajkot, and Porbandar generate electricity.
In simple words: Wind forms from uneven heating of the Earth, causing pressure differences. India uses wind power, ranking fifth globally, with many windmills on coasts and open spaces. Gujarat, Tamil Nadu, and other states produce wind energy, with specific wind farms in Gujarat at Lambha, Mandvi, Devbhumi Dwarka, Jamnagar, Rajkot, and Porbandar.

Exam Tip: Describe the formation of wind, India's rank in wind energy, major producing states, and specific wind farm locations in Gujarat.

Question 11. Write a short note on geothermal energy.
Answer: Geothermal energy is a clean, renewable energy source obtained from the Earth's internal heat. This energy is generated and stored deep within the Earth's crust. It is typically accessed by drilling wells to tap into reservoirs of hot water and steam, which can then be used to drive turbines and produce electricity or for direct heating applications. Regions with high volcanic activity or hot springs are prime locations for geothermal energy exploitation.
In simple words: Geothermal energy comes from the heat inside the Earth. We use it to make electricity or for heating by tapping into hot water and steam deep underground.

Exam Tip: Define geothermal energy as heat from within the Earth and mention its use for electricity generation and heating, often found in areas with hot springs.

Question 12. Write in brief about tidal energy.
Answer: The gravitational pull from the sun and moon leads to tides and ebbs in the oceans. This force of tides and ebbs can be used to create tidal energy. A turbine is linked up to produce electricity from these tidal movements. In 1910, France became the first nation to obtain electricity using tides and ebbs. India has an extensive coastline, giving it significant potential for tidal energy generation. Gujarat has launched a project to produce tidal energy in the Gulf of Kachchh and the Gulf of Khambhat.
In simple words: Tides and ebbs, caused by the sun and moon's gravity, can make tidal energy using turbines. France first did this in 1910. India has great potential due to its long coast, and Gujarat has projects in the Gulf of Kachchh and Gulf of Khambhat.

Exam Tip: Explain how tidal energy is generated from the gravitational forces of the sun and moon, cite France as an early pioneer, and highlight India's potential with examples like Gujarat's gulfs.

Question 13. What is preservation of minerals? Why is it needed?
Answer: Minerals form the foundation for human life and the advancement of our societies. Currently, every country aims to boost its exports as a part of economic growth. To achieve this, nations consistently extract more and more minerals from the earth to create products, which they then export to acquire foreign currency. If this rapid extraction is not halted or managed properly, our valuable mineral resources will quickly run out. Minerals and energy sources are available in finite amounts, yet our consumption increases daily. Without sustainable practices, future generations will be unable to access these essential resources, potentially leading to a bleak global future. Furthermore, excessive exploitation of these resources has greatly harmed the environment and reduced its quality. Therefore, it is crucial to ensure the sustainable use of energy to protect the planet for generations to come.
In simple words: Minerals are key to human life and development. Countries export them for economic growth, but this excessive extraction will soon deplete our mineral resources if not managed.

Exam Tip: Emphasize minerals as foundational for development, the pressure from economic growth for exports, and the critical need for sustainable planning to prevent depletion.

Question 14. State difference between commercial and non-commercial energy resource.
Answer:

Exam Tip: Clearly define and differentiate commercial and non-commercial energy resources based on their use, cost, pollution levels, and provide clear examples for each category.

Question 15. State difference between conventional and non-conventional energy resource.
Answer:

Exam Tip: Distinguish conventional from non-conventional energy sources by their renewability, environmental impact, and exhaustibility, offering specific examples.

Question 16. State difference between natural gas and biogas.
Answer:

Exam Tip: Compare natural gas and biogas based on their origin, availability, primary uses (urban vs. rural), and main forms.

IV. Long Answer Type Questions

Question 1. What is a mineral? Write a brief note on minerals.
Answer: A mineral is a substance created by inorganic processes, having a distinct chemical makeup. Minerals can also be described as solid, liquid, or gaseous materials that form through specific non-biological processes deep within the Earth's rocks. They possess a certain chemical composition, a uniform structure, and a specific atomic arrangement. Consequently, minerals arise from non-living processes that have occurred inside the Earth for an extremely long time. They exist in all three states: solid, liquid, and gas. For example, iron, manganese, gold, and silver are solid minerals. Mercury and petroleum are liquid minerals, while natural gas is a gaseous mineral. Based on how they are used, minerals can be grouped into metallic minerals, non-metallic minerals, and energy resource minerals. The kind of mineral found in the Earth's crust is determined by its formation. For example, metallic minerals like iron, copper, zinc, gold, and silver are discovered in igneous rocks. Minerals employed for energy production and those like diamonds are found in metamorphic rocks.
In simple words: A mineral is a naturally occurring substance with a unique chemical structure. They can be solid (like iron), liquid (like petroleum), or gas (like natural gas), formed deep in the Earth. Minerals are classified into metallic, non-metallic, and energy resources, and their type depends on the rock's origin; for instance, metallic minerals are in igneous rocks, and diamonds in metamorphic rocks.

Exam Tip: Define a mineral comprehensively, include its states of matter, explain its formation process (inorganic/abiotic), classify minerals by use, and mention rock types where different minerals are found.

Question 2. Write a note on iron. State is uses.
Answer: Iron serves as the fundamental mineral or essential metal for the industrial growth of the present world. It is among the most frequently utilized minerals globally. People use it to create items from tiny pins to enormous machines, vehicles, trucks, ships, railroads, bridges, structures, and armaments. Iron is inexpensive, sturdy, and long-lasting, and you can find it in nearly all countries. Furthermore, it readily blends with other minerals to form new compounds.
In simple words: Iron is a key mineral for modern industry, used widely for everything from small pins to big machines. It's cheap, strong, lasts long, and mixes well with other minerals, making it very important.

Exam Tip: When discussing iron, highlight its role as a fundamental metal for modern industry, its vast range of uses from small to large items, and its properties like strength, affordability, durability, and ability to mix with other minerals.

Question 3. Write a note on manganese.
Answer: Manganese is a vital mineral for the iron and steel industries. Uses: Its primary application is in creating steel from iron. Manganese also finds use in the chemical industry for producing bleaching powder, insecticides, dry battery cells, and tiles. It proves beneficial in the leather industry, glass industry, matchbox manufacturing, photography, china-clay utensils, and colored bricks. When manganese is blended with iron rails, it makes them more pliable and robust. Manganese-steel is a highly durable steel employed in machinery designed for breaking rocks and in grinding equipment.
In simple words: Manganese is crucial for making steel and is used in many industries like chemicals, leather, glass, and photography for products like bleaching powder, insecticides, and batteries. When added to iron, it makes stronger and more flexible steel, used in rock-breaking and grinding machines.

Exam Tip: Detail manganese's primary use in steelmaking, its diverse applications across various industries (chemical, leather, glass), and its role in enhancing the strength and flexibility of steel products.

Question 4. Write a note on bauxite.
Answer: Bauxite is the ore from which aluminum is extracted. It is dug from the earth and refined to get pure aluminum. The ore was initially discovered at Les Baux in France in 1921, which gave it its name, Bauxite. Properties and uses: Bauxite is very lightweight but also incredibly strong and long-lasting. It conducts electricity well, resists rust, and is easily shaped. These characteristics make it an exceptionally valuable metal. It is widely employed in making household items, electrical wiring, and devices, as well as in pigments and ship construction. Producing regions: Bauxite comes from states like Odisha, Chhattisgarh, Maharashtra, Jharkhand, and Gujarat. It exists in the Deccan Traps, a geological formation on the Deccan Plateau. You can find it in large quantities in Ranchi, Jharkhand. In Gujarat, it is present in districts such as Jamnagar, Bhavnagar, Junagadh, Amreli, Surat, and Sabarkantha.
In simple words: Bauxite is the ore for aluminum, first found in France in 1921. It's light, strong, rust-free, and conductive, making it useful for utensils, wires, and shipbuilding. Major producing states include Odisha and Gujarat, with significant deposits in the Deccan Traps and specific districts in Gujarat.

Exam Tip: Define bauxite as aluminum's ore, state its discovery origin, list its key properties (light, strong, conductive, ductile, rust-free), common uses, and major producing regions in India.

Question 5. Sustainable use of energy is the only way to a bright future.
Answer: Using energy sustainably is the sole path to a promising future. Over time, constant new discoveries and advancements happen across all sectors. This creates a need for more mineral extraction and consumption. The world has transformed into a global community. Every nation strives to expand its economy. Thus, countries consistently investigate new items, produce them, and then export them to gain foreign currency. All these activities place significant strain on mineral extraction. Minerals and energy sources are available in finite amounts, yet our consumption increases daily. Without sustainable practices, future generations will be unable to access these essential resources, potentially leading to a bleak global future. Furthermore, excessive exploitation of these resources has greatly harmed the environment and reduced its quality. Therefore, it is crucial to ensure the sustainable use of energy to protect the planet for generations to come.
In simple words: Sustainable energy use is vital for a good future. New inventions mean more mineral extraction, which strains limited resources. Nations export minerals for economic growth, but this overuse depletes them and harms the environment. To secure the future, we must use energy sustainably.

Exam Tip: Explain why sustainable use of energy and minerals is crucial, linking it to continuous innovations, global economic demands, the finite nature of resources, and environmental protection for future generations.

Question 6. Write a short note on coal as an energy resource.
Answer: Coal: Humans have utilized coal as a power source since very early times. Formation: Millions of years ago, the Earth was covered in lush plant life. Geological shifts within the Earth's crust then buried this vegetation deep inside the planet. Over many thousands of years, the intense heat and pressure from the Earth's interior caused the carbon-rich plants and certain animals to slowly decompose. This process ultimately converted the buried plant matter into coal.
In simple words: Coal has been used for energy since ancient times. It formed millions of years ago when thick vegetation was buried by earth movements, and then heat and pressure slowly turned it into coal.

Exam Tip: Define coal as an ancient energy source and describe its formation process, including the burial of vegetation, tectonic movements, and the effects of heat and pressure over long periods.

Question 7. What is biogas? How is it formed? State few important locations that produce biogas in India as well as Gujarat.
Answer: Biogas is the gas generated when agricultural waste, molasses (sugarcane residue), other plant matter, animal dung, and human waste decompose. It largely consists of methane, which is a flammable gas primarily employed for cooking. Once biogas is collected, the leftover material in the biogas pit serves as a natural fertilizer. In India, Uttar Pradesh leads in biogas production, with Gujarat ranking second. Gujarat's biggest biogas plant has been built in Methan village near Siddhpur in Patan district, operating through community cooperation. Other functioning biogas plants are situated at Rudratal in Daskroi taluka of Ahmedabad and Dantiwada in Banaskantha districts. People have also begun establishing plants that work either independently or together.
In simple words: Biogas is made from rotting farm waste, dung, and other organic matter, containing mostly methane used for cooking. The leftover material becomes fertilizer. Uttar Pradesh is first in India for biogas, Gujarat is second. Gujarat's biggest plant is in Methan, Patan, and other plants are in Rudratal and Dantiwada.

Exam Tip: Define biogas by its source (organic waste, dung) and main component (methane) and explain its dual use (fuel, fertilizer). Mention leading Indian states in production and specific examples of plants in Gujarat.

V. Fill in the blanks

Question 1. Modern age is also called ....................
Answer: 1. Atomic age
In simple words: The modern age is also called the atomic age.

Exam Tip: Understand why the modern era is associated with the 'atomic age' due to advancements in atomic science and energy.

Question 2. US and Russia have become superpowers due to proper use of ....................
Answer: 2. minerals
In simple words: Superpowers use minerals for their strength.

Exam Tip: Recognize the link between resource utilization, especially minerals, and national power.

Question 3. The metal formation is due to the result of continuous .................... process.
Answer: 3. inorganic
In simple words: Metal forms from non-living processes.

Exam Tip: Recall that metals are formed through inorganic geological processes.

Question 4. Iron, copper, gold, silver etc. are obtained from .................... rocks.
Answer: 4. igneous
In simple words: Iron, copper, and gold come from igneous rocks.

Exam Tip: Remember that many metallic minerals like iron and copper originate from igneous rock formations.

Question 5. The minerals used for energy resources are obtained from .................... rocks.
Answer: 5. sedimentary
In simple words: Energy minerals are found in sedimentary rocks.

Exam Tip: Note that energy resources like coal and oil are typically found in sedimentary rock layers.

VI. Write the following statements are true or false.

Question 1. Natural gas is considered to be the pollution-free source of energy.
Answer: 1. True
In simple words: Natural gas is considered clean energy.

Exam Tip: Recall that natural gas is often favored for its lower environmental impact compared to other fossil fuels.

Question 2. Bauxite is an ore of metal uranium.
Answer: 2. False
In simple words: Bauxite is ore of aluminum, not uranium.

Exam Tip: Correctly identify bauxite as the primary ore for aluminum, not uranium.

Question 3. Natural gas is associated with mineral oil.
Answer: 3. True
In simple words: Natural gas is often found with mineral oil.

Exam Tip: Understand that natural gas deposits are frequently associated with crude oil reservoirs.

Question 4. Mica is considered to be the good conductor of electricity.
Answer: 4. False
In simple words: Mica is an insulator, not a conductor of electricity.

Exam Tip: Remember that mica is prized for its insulating properties, making it a poor conductor of electricity.

Question 5. Hot water springs are located at Unai in Gujarat.
Answer: 5. True
In simple words: Hot springs are found at Unai in Gujarat.

Exam Tip: Recall Unai as a location in Gujarat known for its hot water springs.

Question 2. Which state produces maximum iron in India?
Answer: Karnataka is the state that produces the highest amount of iron in India.
In simple words: Karnataka makes the most iron in India.

Exam Tip: Remember Karnataka as the leading state for iron production in India.

Question 3. By what name modern age is known?
Answer: The modern age is also known as the atomic age.
In simple words: Today's time is called the atomic age.

Exam Tip: Connect the term 'modern age' with 'atomic age' due to significant scientific and technological advancements.

Question 4. Which energy resource is known as a non-renewable energy resource?
Answer: An atomic mineral is recognized as a non-renewable energy source.
In simple words: Atomic minerals are non-renewable energy sources.

Exam Tip: Classify atomic minerals as important but non-renewable energy resources.

Question 5. By which invention usage of coal increased?
Answer: The invention of the steam engine led to an increase in coal usage.
In simple words: The steam engine made people use more coal.

Exam Tip: Understand the historical impact of the steam engine in boosting coal consumption.

VIII. Identify me

Question 1. Usage of coal is increasing by my invention.
Answer: 1. Steam engine
In simple words: My invention made coal usage go up. I am the steam engine.

Exam Tip: Connect the increase in coal use directly to the invention of the steam engine.

Question 2. The biosphere on the earth throbs due to me.
Answer: 2. Solar energy
In simple words: The Earth's biosphere thrives because of me. I am solar energy.

Exam Tip: Recognize solar energy as the fundamental energy source sustaining Earth's biosphere.

Question 3. I provides heat energy on the surface of the Earth.
Answer: 3. Sun
In simple words: I give heat energy on the surface of the Earth. I am the Sun.

Exam Tip: Understand the sun as the primary source of heat energy on Earth's surface.

Question 4. I keep the industries of the nation and the economy throbbing.
Answer: 4. Minerals of energy resource
In simple words: I keep industries and the economy lively. I am energy resource minerals.

Exam Tip: Identify energy resource minerals as crucial for powering industries and sustaining economic activity.

Question 5. I provide heat energy on the surface of the Earth.
Answer: 5. Sun
In simple words: I provide heat to the Earth's surface. I am the Sun.

Exam Tip: Reinforce the sun's role as the Earth's primary heat source.