This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Our Environment > Class 10 Science Chapter 15 Our Environment – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 15 Our Environment Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A detritus food chain begins with ..... A) Decomposersers. B) Herbivores. C) Carnivores. D) Omnivores. Show Answer Correct Answer: A) Decomposersers. 2. What is Biomagnification? A) The increase in population of a species over time. B) The increase in concentration of harmful chemicals in organisms at higher levels in the food web. C) The increased significance of a species roll in an ecosystem. D) The growth of an organism over time. Show Answer Correct Answer: B) The increase in concentration of harmful chemicals in organisms at higher levels in the food web. 3. An artificial ecosystem is A) Crop field. B) Desert. C) Forest. D) Pond. Show Answer Correct Answer: A) Crop field. 4. SMOG is derived from? A) Smoke. B) Fog. C) Both A and B. D) None of the above. Show Answer Correct Answer: C) Both A and B. 5. Which is human made environment? A) Mountain. B) Road. C) Sea. D) None of the above. Show Answer Correct Answer: B) Road. 6. The transfer of energy in a food chain is always: A) Unidirectional. B) Methane. C) Bi-directional. D) Random. Show Answer Correct Answer: A) Unidirectional. 7. Being able to use resources from the environment without causing harm. A) Depletion. B) Sustainable. C) Pollution. D) Conservation. Show Answer Correct Answer: B) Sustainable. 8. Non biodegradable wastes can be managed by practicing techniques like A) Reduce Reuse Reabsorb. B) Reduce reuse recycle. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reduce reuse recycle. 9. The first conference on Ozone layer was held in: A) 1992. B) 1989. C) 1987. D) 2000. Show Answer Correct Answer: C) 1987. 10. Order of energy flow in ecosystem is: A) Sunlight $\rightarrow$ producers $\rightarrow$ carnivores $\rightarrow$ herbivores. B) Sunlight $\rightarrow$ producers $\rightarrow$herbivores $\rightarrow$ carnivores. C) Sunlight $\rightarrow$ herbivores $\rightarrow$ carnivores $\rightarrow$ producers. D) Sunlight $\rightarrow$herbivores $\rightarrow$producers $\rightarrow$carnivores. Show Answer Correct Answer: B) Sunlight $\rightarrow$ producers $\rightarrow$herbivores $\rightarrow$ carnivores. 11. Environment is damaged by use of paper bag. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. What is an example of a biotic factor? A) Rocks. B) Soil. C) Skunk. D) Water. Show Answer Correct Answer: C) Skunk. 13. Ozone layer protects us from harmful ultra-violet radiations of the sun. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Which of the following is not a functional component of an ecosystem? A) Sunlight. B) Decomposersers. C) Energy flow. D) Communities. Show Answer Correct Answer: C) Energy flow. 15. Which of the following is an abiotic components A) Soil. B) Animals. C) Microorganisms. D) Plants. Show Answer Correct Answer: A) Soil. 16. Among the following which is a biodegradable waste only? A) Peas, kitchen foil, soap. B) Vegetable peels, paper, leaves. C) Wood, plastic bottle, rubber. D) Soap, detergent, paper. Show Answer Correct Answer: B) Vegetable peels, paper, leaves. 17. The water solution of SO$_{2}$ is A) Sulphurous acid. B) Sulphuric acid. C) Pyrosulphuric acid. D) None of these. Show Answer Correct Answer: A) Sulphurous acid. 18. What is one thing humans can do to positively impact the environment? A) They can throw their trash away anywhere. B) They can recycle items if possible. C) They can empty their drinks into rivers and other water sources. D) They can work in factories that produce a lot of smoke. Show Answer Correct Answer: B) They can recycle items if possible. 19. Water pollution has become a major problem in the world today. It has an adverse affect on both the environment and health. What are the main sources of water pollution in India? A) Municipal sewage. B) Bathing. C) Industrial discharge. D) Both a and c. Show Answer Correct Answer: D) Both a and c. 20. What is the functional unit of environment A) Grass. B) Biome. C) Environment. D) None of the above. Show Answer Correct Answer: C) Environment. 21. The natural environment consists of ..... A) Activities among human beings. B) Plants and animals that surround the human beings. C) Creations among human beings. D) Interactions among human beings. Show Answer Correct Answer: B) Plants and animals that surround the human beings. 22. Edaphic factors include ..... A) Biotic components. B) Abiotic components. C) Consumers. D) Producers. Show Answer Correct Answer: B) Abiotic components. 23. In a food chain the second trophic level is occupied by: A) Human beings. B) Herbivores. C) Producers. D) Carnivores. Show Answer Correct Answer: B) Herbivores. 24. What does a food chain always start with? A) The producer. B) The consumer. C) The carnivore. D) The herbivore. Show Answer Correct Answer: A) The producer. 25. Sulphur dioxide affects A) Arteries. B) Alveoli of lungs. C) Nerves. D) Haemoglobin of blood. Show Answer Correct Answer: B) Alveoli of lungs. 26. As human beings occupy the top level in any food chain, the maximum concentration of these chemicals get accumulated in our bodies. This phenomenon is known as A) Biological accumulation. B) Biological magnification. C) Chemical magnification. D) Chemical accumulation. Show Answer Correct Answer: B) Biological magnification. 27. What is one way we can reduce human impact on the environment? A) Decrease Endangered Species Protections. B) Increase the use of CFCs. C) Increase pollution prevention. D) Decrease the use of conservation. Show Answer Correct Answer: C) Increase pollution prevention. 28. The term environment means the ..... A) Surroundings. B) Hydrosphere. C) Lithosphere. D) Atmosphere. Show Answer Correct Answer: A) Surroundings. 29. ..... is a non-biodegradable substance. A) Newspaper. B) Aluminium. C) Plant products. D) Human/ animal waste Newspaper Aluminium Plant products. Show Answer Correct Answer: B) Aluminium. 30. Catching large numbers of fish at a very fast rate. A) Overfishing. B) Sustainable Fishing. C) Aquaculture. D) Bycatch. Show Answer Correct Answer: A) Overfishing. 31. Which of the following is the best way for disposal of vegetable and fruit peels? A) Landfill. B) Recycling. C) Composting. D) Burning. Show Answer Correct Answer: C) Composting. 32. What are autotrophic organisms? A) Organisms are those that need to ingest organic material to nourish themselves. B) Organisms are those that can produce their own food, or rather, that produce organic material from inorganic compounds. C) A set of all of the ecosystems on the planet. D) I don't know. Show Answer Correct Answer: B) Organisms are those that can produce their own food, or rather, that produce organic material from inorganic compounds. 33. Green plants utilize how much percent of sun's energy to prepare their food by the process of photosynthesis? A) 3%. B) 100%. C) 10%. D) 1%. Show Answer Correct Answer: D) 1%. 34. When is Earth day? A) April 22. B) August 11. C) January 10. D) March 6. Show Answer Correct Answer: A) April 22. 35. Which one of the following is not a natural ecosystem? A) River. B) Cropland. C) Ocean. D) Forest. Show Answer Correct Answer: B) Cropland. 36. Food chains are interconnecting food webs. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 37. Which of the statements is incorrect? A) All green plants and blue green algae are producers. B) Green plants get their food from organic compounds. C) Producers prepare their own food from inorganic compounds. D) Plants convert solar energy into chemical energy. Show Answer Correct Answer: B) Green plants get their food from organic compounds. 38. Pick the odd one out A) Bottle. B) Pepsi Can. C) Thermacole plate. D) Vegetable peels. Show Answer Correct Answer: D) Vegetable peels. 39. Food web does not provide alternative pathway of food availability A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 40. A collection of organisms that belong to different populations but all live in the same area and interact with one another. A) Ecosystem. B) Ecosphere. C) Community. D) Population. Show Answer Correct Answer: C) Community. 41. (b) What phenomenon is responsible for the accumulation of non biodegradable material in the food chain? A) Bio-significance. B) Biotechnology. C) Biomagnification. D) Biochemistry. Show Answer Correct Answer: C) Biomagnification. 42. Living component of an ecosystem is called A) Consumers. B) Producers. C) Biotic factor. D) Abiotic factor. Show Answer Correct Answer: C) Biotic factor. 43. What is the definition of Abiotic factors? A) Alive organisms or things. B) Dead things or organisms. C) Panda. D) Insect. Show Answer Correct Answer: B) Dead things or organisms. 44. Narrow zone where land water and air interact is called A) Hydrosphere. B) Lithosphere. C) Environment. D) Biosphere. Show Answer Correct Answer: D) Biosphere. 45. ASSERTION:Biomagnification is caused due to accumulation of biodegradable toxicants in organisms at each successive trophic level.REASON:Biomagnification leads to the maximum accumulation of chemicals in small fishes. A) Both A & R are true. R is the correct explanation of A. B) Both A & R are true. R is the incorrect explanation of A. C) A is true but R is false. D) A is false but R is true. E) Both A & R are false. Show Answer Correct Answer: E) Both A & R are false. 46. Use of chemicals like CFC's are a danger to ..... layer of the Earth. A) Ozone. B) Mesosphere. C) Stratosphere. D) Troposphere. Show Answer Correct Answer: A) Ozone. 47. ..... is not an abiotic factor A) Altitude. B) Animals. C) Temperature. D) Humidity. Show Answer Correct Answer: B) Animals. 48. Temperature, light, water, soil, and air are all ..... parts of the environment A) Consumers. B) Biotic factors. C) Abiotic factors. D) Producers. Show Answer Correct Answer: C) Abiotic factors. 49. Which one of the following chemicals is not related to biological magnification? A) Chlorinated hydrocarbon. B) Organophosphates. C) Polychlorinated biphenyls. D) Heavy metals. Show Answer Correct Answer: B) Organophosphates. 50. What happens when the environment is polluted? A) You will become sick. B) It will look dirty. C) Not safe at all. D) All of these. Show Answer Correct Answer: D) All of these. 51. The last organism in a food chain is A) Producer. B) Decomposersers. C) Parasites. D) None of the above. Show Answer Correct Answer: B) Decomposersers. 52. Which of these organisms are the most important decomposers in an ecosystem? A) Algae and fungi. B) Fungi and bacteria. C) Algae and bacteria. D) Bacteria and virus. Show Answer Correct Answer: B) Fungi and bacteria. 53. Flow of energy in a food chain is always A) Bidirectional. B) Unidirectional. C) Multidirectional. D) All of the above. Show Answer Correct Answer: B) Unidirectional. 54. A network of interconnected food chain is called A) Biomagnification. B) Ecosystem. C) Food Web. D) Flow of energy. Show Answer Correct Answer: C) Food Web. 55. What percentage of sunlight is absorbed by green plants during photosynthesis A) 100%. B) 0%. C) 10%. D) 1%. Show Answer Correct Answer: D) 1%. 56. If a grasshopper is eaten by a frog, then the energy transfer will be from A) Producer to decomposer. B) Secondary consumer to Primary consumer. C) Producer to primary consumer. D) Primary consumer to secondary consumer. Show Answer Correct Answer: D) Primary consumer to secondary consumer. 57. What is the study of the interactions among organisms and between organisms and their environments called? A) Biosphere. B) Astronomy. C) Ecology. D) Biology. Show Answer Correct Answer: C) Ecology. 58. Which pollutant is dangerous for Taj Mahal A) CO$_{2}$. B) SO$_{2}$. C) CO. D) All of these. Show Answer Correct Answer: B) SO$_{2}$. 59. Which is not a component of human environment A) Land. B) Religion. C) Community. D) All of these. Show Answer Correct Answer: A) Land. 60. What is the definition of Biotic factors? A) Plants. B) Soil. C) Living things or organisms. D) Dead things. Show Answer Correct Answer: C) Living things or organisms. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 15 Our Environment Quiz 1Class 10 Science Chapter 15 Our Environment Quiz 2Class 10 Science Chapter 15 Our Environment Quiz 4Class 10 Science Chapter 15 Our Environment Quiz 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books