Management of Natural Resources — Previous Year Questions (Class 10 Science)
Natural resources are essential for human survival and economic development. Sustainable management ensures availability for current and future generations
TL;DR: Natural resources are essential for human survival and economic development. Sustainable management ensures availability for current and future genera…
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Natural resources are essential for human survival and economic development. Sustainable management ensures availability for current and future generations
Management of Natural Resources — Previous Year Questions with Solutions
Q (2023, 3 marks): What are natural resources? Classify them with examples.
Answer: Natural Resources:
Definition - Materials from nature that can be used to meet human needs.
Classification:
1. Biotic Resources (Living):
- Forests and trees
- Wildlife and animals
- Fisheries
- Agricultural crops
2. Abiotic Resources (Non-living):
- Water
- Minerals (iron, coal, copper)
- Soil
- Air
- Fossil fuels (petroleum, natural gas)
3. Renewable Resources:
- Can be regenerated (water, forests, wind, solar)
- Can sustain infinite use if managed properly
4. Non-renewable Resources:
- Cannot be regenerated once exhausted
- Limited supply (coal, petroleum, minerals)
- Require millions of years to form
Q (2022, 4 marks): Explain the concept of sustainable development and its importance.
Answer: Sustainable Development:
Definition - Development that meets present needs without compromising future generations' ability to meet theirs.
Three Pillars:
1. Economic Sustainability:
- Long-term economic growth
- Efficient resource use
- Job creation
2. Social Sustainability:
- Equity and justice
- Quality of life
- Community well-being
3. Environmental Sustainability:
- Conservation of resources
- Preservation of ecosystems
- Reduced pollution
Importance:
1. Ensures resource availability for future
2. Reduces environmental degradation
3. Balances growth with conservation
4. Prevents resource depletion
5. Maintains ecological balance
6. Promotes equitable distribution
Q (2021, 4 marks): What are the causes of deforestation? What are its consequences?
Answer: Causes of Deforestation:
1. Agricultural expansion - Clear forests for farming
2. Logging - Commercial timber harvesting
3. Urban development - Cities expand into forests
4. Mining - Surface mining operations
5. Grazing - Livestock overgrazing
6. Fire - Natural and human-caused fires
7. Infrastructure - Roads, dams, railways
Consequences:
1. Environmental:
- Loss of biodiversity and wildlife habitat
- Soil erosion and degradation
- Climate change (reduced CO2 absorption)
- Water cycle disruption
2. Social and Economic:
- Loss of livelihood for forest communities
- Reduced timber supply
- Loss of medicinal plants
- Increased poverty
3. Global Impact:
- Reduced oxygen production
- Increased greenhouse gases
- Desertification
Q (2023, 5 marks): What are the methods of water conservation? Explain any three with details.
Answer: Methods of Water Conservation:
1. Water Harvesting:
- Collection and storage of rainwater
- Underground tanks and ponds
- Used for irrigation and domestic use
- Reduces groundwater depletion
2. Watershed Management:
- Managing water flow in watershed areas
- Contour farming and terracing
- Check dams and trenches
- Prevents erosion and increases infiltration
3. Irrigation Efficiency:
- Drip irrigation systems
- Sprinkler systems
- Reduces water waste compared to flooding
- Delivers water directly to roots
4. Recycling and Reuse:
- Recycle wastewater for non-potable uses
- Greywater reuse for gardening
- Industrial recycling
5. Groundwater Recharge:
- Injection wells
- Percolation tanks
- Afforestation increases infiltration
Q (2022, 4 marks): What is the importance of forests? How can we manage forests sustainably?
Answer: Importance of Forests:
1. Environmental:
- Oxygen production
- Carbon dioxide absorption
- Climate regulation
- Biodiversity conservation
2. Economic:
- Timber and wood products
- Medicinal plants
- Honey and herbs
- Tourism revenue
3. Social:
- Livelihood for forest communities
- Traditional knowledge preservation
- Recreation and wellness
Sustainable Forest Management:
1. Controlled Harvesting:
- Selective logging
- Maintain minimum tree cover
- Rotation cropping
2. Afforestation:
- Planting new trees
- Replace harvested trees
- Increase forest cover
3. Protection:
- Create protected areas and sanctuaries
- Prevent illegal logging
- Control forest fires
4. Community Participation:
- Involve local communities
- Sustainable livelihoods
- Traditional practices integration
Q (2021, 4 marks): What is the coal and petroleum crisis? What are alternative energy sources?
Answer: Coal and Petroleum Crisis:
Problems:
1. Non-renewable - Limited reserves, will be depleted
2. Pollution:
- Carbon dioxide causing climate change
- Acid rain from sulfur dioxide
- Air pollution affecting health
3. Environmental damage:
- Mining destroys landscapes
- Oil spills contaminate water
- Extraction affects ecosystems
4. Economic:
- Rising fuel costs
- Import dependency
- Resource conflicts
Alternative Energy Sources:
1. Solar Energy:
- Renewable and unlimited
- Photovoltaic cells and thermal systems
- Reduces dependence on fossil fuels
2. Wind Energy:
- Wind turbines generate electricity
- Clean and renewable
- Cost-effective
3. Hydroelectric Power:
- Water dams generate electricity
- Renewable and clean
- Can provide irrigation
4. Geothermal Energy:
- Heat from Earth's interior
- Suitable for specific regions
5. Biomass:
- Energy from organic matter
- Biogas and biofuels
Frequently Asked Questions
What is the difference between conservation and preservation of resources?
Conservation involves sustainable use of resources to ensure they remain available, while preservation means protecting resources in their natural state with minimal or no use.
Why should we use renewable energy sources?
Renewable energy sources are unlimited, environment-friendly, reduce pollution and climate change effects, and provide long-term energy security.
More Class 10 Science PYQs
- Chemical Reactions and Equations
- Light (Reflection and Refraction)
- Electricity
- Acids, Bases and Salts
- Metals and Non-metals
- Life Processes
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