Here are 100 One-Liner General Knowledge (GK) facts from Class X Science – Chapter 13: Our Environment under Unit V – Natural Resources:


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✅ 100 One-Liner GK – Chapter: Our Environment

1. The environment includes all living and non-living components around us.


2. Biotic components include plants, animals, and microorganisms.


3. Abiotic components are non-living elements like air, water, and soil.


4. An ecosystem is a system formed by the interaction of organisms with their surroundings.


5. Forests, ponds, and oceans are examples of natural ecosystems.


6. Aquarium and crop fields are examples of artificial ecosystems.


7. Green plants are producers as they prepare their own food through photosynthesis.


8. Consumers depend on producers or other organisms for food.


9. Herbivores eat only plants.


10. Carnivores eat only other animals.


11. Omnivores consume both plants and animals.


12. Decomposers break down dead organisms into simpler substances.


13. Fungi and bacteria are common decomposers.


14. A food chain shows how energy flows from one organism to another.


15. The sun is the ultimate source of energy for all food chains.


16. A food web is a network of interconnected food chains.


17. Each step in a food chain is known as a trophic level.


18. Producers occupy the first trophic level.


19. Herbivores occupy the second trophic level.


20. Carnivores and omnivores occupy higher trophic levels.


21. Only 10% of energy is transferred to the next trophic level – known as the 10% Law.


22. The remaining 90% of energy is lost as heat.


23. Energy flow in an ecosystem is unidirectional.


24. The number of organisms decreases as we go higher in the trophic levels.


25. Biological magnification refers to the accumulation of toxic substances at each trophic level.


26. DDT is an example of a pesticide that causes biological magnification.


27. Plastic is a major pollutant because it is non-biodegradable.


28. Biodegradable substances are broken down naturally by decomposers.


29. Non-biodegradable substances remain in the environment for long periods.


30. Examples of biodegradable waste include paper, food peels, and cotton.


31. Examples of non-biodegradable waste include plastic, glass, and metals.


32. Accumulation of waste leads to land and water pollution.


33. Ozone (O₃) forms a protective layer in the atmosphere.


34. The ozone layer blocks harmful ultraviolet (UV) radiation.


35. Chlorofluorocarbons (CFCs) damage the ozone layer.


36. The ozone layer is found in the stratosphere.


37. UV radiation can cause skin cancer and eye damage.


38. The thinning of the ozone layer is known as ozone depletion.


39. The Montreal Protocol was signed to control ozone-depleting substances.


40. Air pollution affects the respiratory health of living beings.


41. Water pollution harms aquatic ecosystems and drinking water sources.


42. Soil pollution reduces agricultural productivity.


43. Noise pollution affects both humans and animals.


44. Waste management is essential for environmental protection.


45. Composting converts biodegradable waste into organic fertilizer.


46. Vermicomposting uses earthworms to convert waste into compost.


47. Reduce, Reuse, and Recycle are the three Rs of waste management.


48. Segregation of waste helps in better recycling and disposal.


49. Global warming is the rise in Earth’s average temperature.


50. Carbon dioxide (CO₂) is the primary greenhouse gas causing global warming.


51. Methane (CH₄) is another potent greenhouse gas.


52. The greenhouse effect traps heat in the atmosphere.


53. Climate change leads to extreme weather conditions.


54. Deforestation is a major cause of ecological imbalance.


55. Afforestation helps in restoring the environment.


56. Overuse of chemical fertilizers harms the soil and water.


57. Sustainable development means development without harming the environment.


58. Fossil fuels release harmful gases when burned.


59. Switching to renewable energy reduces pollution.


60. Solar and wind energy are clean energy sources.


61. Plastic pollution harms marine animals.


62. Microplastics enter the food chain and affect health.


63. Overpopulation puts pressure on natural resources.


64. Excessive use of pesticides contaminates water and soil.


65. Urbanization leads to the loss of biodiversity.


66. Eco-friendly habits help conserve the environment.


67. Community participation is key to environmental protection.


68. Awareness programs promote eco-conscious behavior.


69. Schools promote green habits through eco-clubs.


70. Rainwater harvesting conserves water for future use.


71. Waste segregation should be practiced at home.


72. Industries must treat waste before disposal.


73. Public transport helps reduce air pollution.


74. Planting trees improves air quality.


75. Replacing plastic bags with cloth bags reduces plastic use.


76. Noise levels are measured in decibels (dB).


77. Use of catalytic converters in vehicles reduces emissions.


78. Eco-labels promote environmentally responsible products.


79. Water bodies should not be used for dumping waste.


80. Laws like the Environment Protection Act safeguard the ecosystem.


81. Eco-sensitive zones are protected areas around forests and wildlife sanctuaries.


82. Recycling paper saves trees and reduces deforestation.


83. Fluorescent lights should be disposed of safely due to mercury content.


84. Coral reefs are endangered due to warming oceans.


85. Wetlands act as natural water purifiers.


86. Biodiversity means the variety of life forms in an area.


87. Extinction of species disrupts the food chain.


88. Overfishing reduces marine biodiversity.


89. Recycling plastic reduces the demand for new plastic.


90. Natural disasters can disrupt entire ecosystems.


91. People should avoid littering public places.


92. Zero-waste lifestyle promotes sustainable living.


93. E-waste should be recycled in specialized centers.


94. Used batteries contain harmful chemicals and need safe disposal.


95. Climate literacy should be part of school education.


96. Solar cookers save fuel and reduce indoor pollution.


97. Green buildings use resources efficiently and sustainably.


98. Rooftop gardens help cool buildings naturally.


99. Trees play a major role in maintaining the carbon-oxygen balance.


100. Protecting the environment is our collective responsibility.




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