WORKSHEET SOLUTIONS/ Natural Resources and Their Sustainable Use for Class 8 Social Studies/FOR ONLINE CLASSES PLEASE CONTACT 9491878325

WORKSHEET SOLUTIONS/ Natural Resources and Their Sustainable Use for Class 8 Social Studies/FOR ONLINE CLASSES PLEASE CONTACT 9491878325

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  All the best 1/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 Solution 8TH CLASS / SOCIAL NEW NCERT /NATURAL RESOURCES AND THEIR USE Class 08 - Social (NEW) Section A 1. (b) Pure Air Explanation: Only clean, breathable air supports life. 2. (c) Study and care of trees and plants Explanation: Vṛikṣhāyurveda emphasizes botanical science for plant care. 3. (a) Wind energy Explanation: Wind energy is naturally replenished and considered renewable. 4. (a) Maintaining the rhythm of natural restoration processes Explanation: Natural cycles must remain undisturbed for resources to stay renewable. 5. (a) Resources for life, materials, and energy Explanation: Resources are categorized based on necessity for life, materials, or energy. 6. (c) Water Explanation: Water can be used for hydropower to generate electricity. 7. (b) Wood Explanation: Wood is used in creating furniture and other physical objects. 8. (a) Fresh water from a river Explanation: Freshwater is derived from nature and is used by humans, making it a natural resource. 9. (a) Easily visible Explanation: Visibility is not a requirement for something to be classified as a resource. 10. (a) Can be replenished naturally Explanation: Renewable resources can be replenished through natural processes. 11. (c) Regeneration Explanation: Regeneration is the natural renewal and recovery of ecosystems. 12. (d) Air Explanation:
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  All the best 2/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 Air is essential for life, providing the oxygen needed for breathing. 13. (a) It is abundant and naturally replenished by the sun Explanation: Solar energy is constantly available and renewable. 14. (a) Use of cow dung Explanation: Traditional farming uses natural fertilizers like cow dung. 15. (a) Trees Explanation: Trees provide wood, which is used to make furniture. 16. (b) Coal Explanation: Coal is a not-so-obvious natural resource extracted from deposits in the earth. 17. (b) Hydroelectric power from water Explanation: Electricity is generated using water in hydroelectric plants. 18. (d) Rajasthan Explanation: Rajasthan hosts one of the world's largest solar parks. 19. (a) River Water Explanation: River water remains renewable when sources like glaciers are conserved. 20. (c) Coal Explanation: Coal is a resource for energy, not directly essential for life. Section B I. 21. A. Dudhsagar Waterfall (Goa) B. Punjab
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  All the best 3/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 II. Section C 22. (a) Both A and R are true and R is the correct explanation of A. Explanation: Cement production is indeed polluting due to dust emissions that harm respiratory health. 23. (b) Both A and R are true but R is not the correct explanation of A. Explanation: Technology influences resources, but economic feasibility is one of the several factors. 24. (d) A is false but R is true. Explanation: Exploitation is not always economically feasible, but resources should meet criteria mentioned in R. 25. (b) Both A and R are true but R is not the correct explanation of A. Explanation: Both A and R are true but R is not the correct explanation of A. 26. (c) A is true but R is false. Explanation: Environmental factors greatly impact the sustainability of renewable resources. Section D 27. State whether the given statement is True or False: (b) False Explanation: False (a) (b) False Explanation: Not all elements are directly accessible or usable as resources. (b) (a) True Explanation: (c)
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  All the best 4/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 Section E 28. Fill in the blanks: Air and water are fundamental to life and are widely available. (b) False Explanation: The text notes objects enrich our lives beyond utility. (d) (a) True Explanation: A mature tree produces about 275 liters of oxygen per day. (e) (a) True Explanation: The exploitation of an entity must be culturally acceptable to be termed a resource. (f) (a) True Explanation: Non-renewable resources can be depleted if used irresponsibly. (g) (a) True Explanation: Resource classification depends on the economic feasibility of extraction. (h) (b) False Explanation: The text associates this example with resource use for materials. (i) (a) True Explanation: Employment opportunities arise around industries developed near natural resources. (j) (b) False Explanation: Competent management depends on extensive knowledge. (k) (a) True Explanation: Trees are seen as a resource when utilized like in furniture making. (l) (a) True Explanation: Without accessibility, entities cannot be considered resources. (m) (b) False Explanation: Solar energy is a renewable resource. (n) (b) False Explanation: Non-renewable resources cannot be replenished at the rate they are used. (o) evenly (a) air (b) non-renewable (c) International Solar (d) restoration (e) precious (f) organic (g) water (h) Kaveri (i) knowledge (j) accessible (k)
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  All the best 5/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 Section F 29. Sure! Here are the two points: 1. Releases large amounts of CO2, contributing to global warming. 2. Causes dust pollution, degrading air quality and harming health. 30. Natural resources influence trade patterns by determining what nations import or export, based on their availability, dictating international trade routes and economic interactions between countries. 31. Air and water are essential natural resources for human life. They are necessary for breathing and hydration. 32. Coal and petroleum are natural resources used as energy sources for electricity and transportation. 33. Nature provides many entities existing independently, but they become resources when humans use them for survival or production. For example, trees turn into resources when processed into furniture. This transformation depends on technology for access, economic feasibility of extraction, and cultural acceptance of use, showing how human needs convert natural elements into valuable resources. 34. Human governance and strategic planning are pivotal in offsetting the 'natural resource curse' by ensuring that natural resources are effectively managed and converted into long-term economic benefits. They help in balancing resource extraction with sustainability, promoting industries, and ensuring that resource wealth translates into broader societal gains. 35. Resources essential for life include air, water, and food. They are fundamental as they provide the fundamental elements necessary for living organisms to survive. Air is crucial for respiration, water is vital for hydration and various biological processes, and food provides the nutrients and energy needed for growth, repair, and everyday functioning of the body. 36. Cultural acceptability determines if exploiting a natural entity aligns with societal norms and values. In some cultures, sacred groves must remain untouched, even if they contain valuable resources like wood, because cutting down trees conflicts with cultural beliefs. Therefore, cultural acceptance is necessary to transition nature into a resource. 37. Disruption of the glacier replenishment cycle reduces water supply to areas dependent on glacial melt, harming agriculture, drinking water availability, and hydroelectric power generation. Rapid melting also raises sea levels, increasing the risk of floods and threatening coastal communities, ecosystems, and landscapes, highlighting the critical importance of balanced glacier cycles for sustaining life and environmental stability. 38. Human activities, like overfishing, deforestation, and industrial waste discharge, disrupt natural cycles, leading to severe ecological implications. Such disturbances prevent restoration and regeneration, causing issues like rising global temperatures, melting glaciers, and biodiversity loss. These consequences lead to resource depletion, unpredictable weather, and loss of ecosystems’ productivity, affecting water security and agricultural stability. Sustainable practices are essential to mitigate these impacts and ensure a balanced interaction with natural cycles, aligning human activity with Earth's regenerative capacity. 39. Water conservation is integral to the responsible use of natural resources as it ensures sustainable water availability for various needs without depleting resources. Conserving water helps maintain ecological balance, supporting aquatic ecosystems and wildlife. It mitigates issues like groundwater depletion, reducing dependency on unsustainable extraction. Conserving water through efficient irrigation, reduced wastage, and rainwater harvesting enhances agricultural productivity and resilience. Overall, water conservation is crucial for securing water resources for future generations, supporting socio-economic development, and adapting to climate variability, fostering a harmonious relationship with nature. 40. Natural resources used for energy production include coal, water, petroleum, natural gas, sunlight, and wind. These resources are pivotal in producing electricity, powering transportation, and supporting various production processes. Their contribution to modern living lies in enabling technological Wootz (l) furniture (m) natural resource curse (n) restoration (o)
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  All the best 6/ 6 S A M Y A N S E D U H U B / F O R O N L I N E C L A S S E S C O N T A C T 9 4 9 1 8 7 8 3 2 5 advancements, enhancing comfort, and improving overall quality of life by providing essential energy for diverse human activities and infrastructure developments. 41. Renewable resources, like solar and wind energy, naturally regenerate over time, provided they are managed sustainably. They offer ongoing potential and are often environmentally friendly. In contrast, non-renewable resources, such as coal and oil, take millions of years to form and deplete with continuous extraction, leading to finite availability. While renewable resources support ecological balance through restoration and regeneration, the exploitation of non-renewable resources often contributes to pollution and environmental challenges. Both resource types require mindful usage for sustained benefits. 42. Daily Life: Resources like water from rivers or coal for electricity shape where we live and how we cook or light our homes. For example, villages near rivers have water easily. Economy: Areas with coal (like Jharkhand) or oil (like Mumbai High) have jobs in mining or refining, boosting money and trade. Health: Clean air and water from forests or mountains keep us healthy, but pollution from overused resources can cause sickness. Education: Schools in resource-rich areas (e.g., near fertile plains) may have better facilities, while remote places struggle. Culture: Traditions, like river worship in India, grow from where resources are, shaping festivals and beliefs. Why It Matters: Uneven distribution means some places thrive while others need help, affecting everyone’s life! Section G a. 43. Resources essential for life include air, water, and soil, which provide us with the air we breathe, the water we drink, and the soil that gives us food. Without them, life cannot exist. b. Humans transform Nature’s gifts into useful objects or items of beauty. For example, wood can be made into a chair or carved into a statuette, while India’s diversity provides materials like marble, coal, and gold. c. Natural resources are categorized into three groups: essential for life, such as air, water, and soil; resources for materials, like wood, marble, coal, and gold, which create utility and beauty; and resources for energy, such as coal, petroleum, wind, sunlight, and water, which are the foundation of electricity, transportation, and production processes. a. 44. A resource is renewable if it follows Nature’s principle of restoration and regeneration, like forests, rivers, or soil. They remain renewable only when managed sustainably, without disturbing their natural cycles of replenishment. b. Fossil fuels are called non-renewable because they are formed over millions of years and cannot be replenished at the rate humans consume them. Once exhausted, they cannot be naturally replaced quickly. c. Renewable resources depend on restoration and regeneration. However, human actions like deforestation, fossil fuel-driven industrialisation, over-fishing, and untreated industrial waste disrupt these cycles. For example, overharvesting timber reduces forests, and industrial waste poisons rivers, preventing natural renewal. Such disturbances convert potentially renewable resources into depleted ones, creating long-term ecological imbalance.