This quiz works best with JavaScript enabled. Home > Class 10 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The Earth's temperature rises due to ..... A) Natural disasters. B) Melting ice caps. C) Greenhouse effect. D) Mudslides. Show Answer Correct Answer: C) Greenhouse effect. 2. World Environment Dya is celebrated on A) 5th June. B) 11th July. C) 16th October. D) 26th December. Show Answer Correct Answer: A) 5th June. 3. All energy on Earth ultimately comes from what source? A) Water. B) Sun. C) Consumers. D) Oxygen. Show Answer Correct Answer: B) Sun. 4. How much amount of energy will not be transferred to a herbivore if the amount of energy of producer is x units: A) 90%. B) 50%. C) 70%. D) None of the above. Show Answer Correct Answer: A) 90%. 5. What is the organic material of biological origin called? A) Biomass. B) Bioenergy. C) Biofuel. D) Biogeochemical cycle. Show Answer Correct Answer: A) Biomass. 6. What will happen if deer is missing from the food chain:Grass $\rightarrow$ Deer $\rightarrow$ Tiger? A) The population of tiger will increase. B) The population of tiger will increase. C) The population of grass decrease. D) Population of tiger decrease and grass increases. Show Answer Correct Answer: D) Population of tiger decrease and grass increases. 7. The manufacturing of Chlorofluorocarbons free refrigerators is mandatory throughout the world. How this help prevent ozone depletion? A) This will help convert oxygen molecules into ozone. B) This will help convert the CFCs into ozone molecules. C) This will reduce the production of CFC from oxygen molecules. D) This will reduce the release of CFCs that reacts with ozone molecules. Show Answer Correct Answer: D) This will reduce the release of CFCs that reacts with ozone molecules. 8. The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as: A) Biological accumulation. B) Biological magnification. C) Biological environment. D) Chemical magnification. Show Answer Correct Answer: B) Biological magnification. 9. Rag pickers remove: A) Plastic, polythene, paper and metal wastes. B) Rags, cardboards, glass articles. C) Both 1 and 2. D) Food articles. Show Answer Correct Answer: C) Both 1 and 2. 10. ..... is a terrestrial ecosystem. A) A natural forest. B) Lake. C) Pond. D) Aquarium. Show Answer Correct Answer: A) A natural forest. 11. Natural environment is important because ..... A) It is essential to sustain life. B) It helps in providing scenic beauty. C) It provides food for many living beings. D) None of the above. Show Answer Correct Answer: A) It is essential to sustain life. 12. What is a landfill? A) A place for people to recycle. B) A place where people's trash is taken. C) A place where oil spills begin. D) A type of factory. Show Answer Correct Answer: B) A place where people's trash is taken. 13. The nonliving part of a habitat is called: A) Abiotic factor. B) Biotic factor. C) All the above. D) None of the above. Show Answer Correct Answer: A) Abiotic factor. 14. Food web is the A) Food that a spider collects using its web. B) Network of interlinked trophic levels. C) Network of interlinked food chains. D) Display of food items on a website. Show Answer Correct Answer: C) Network of interlinked food chains. 15. ASSERTION:Flow of energy in a food chain is unidirectional.REASON:Energy captured by autotrophs does not revert back to solar input and it passes to herbivores. 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: A) Both A & R are true. R is the correct explanation of A. 16. How much amount of energy is transferred to each trophic level A) 20%. B) 30%. C) 10%. D) 90%. Show Answer Correct Answer: C) 10%. 17. Sources of energy that took millions of years to form. A) Fossil Fuels. B) Renewable Energy. C) Nuclear Energy. D) Geothermal Energy. Show Answer Correct Answer: A) Fossil Fuels. 18. What does the Ozone in the atmosphere do? A) Causes the greenhouse effect. B) Causes acid rain. C) Protects the Earth from harmful infrared (IR) rays. D) Protects the Earth from harmful ultraviolet (UV) rays. Show Answer Correct Answer: D) Protects the Earth from harmful ultraviolet (UV) rays. 19. What is a biosphere? A) A biosphere is the set of all of the ecosystems on the planet. B) A biosphere is all the waters on the earth's surface, such as lakes and seas. C) A biosphere is where all biotic and abiotic organisms interact. D) A biosphere is the envelope of gases surrounding the earth or another planet. Show Answer Correct Answer: A) A biosphere is the set of all of the ecosystems on the planet. 20. The major components of physical environment are ..... A) Atmosphere, lithosphere, hydrosphere. B) Atmosphere, biosphere, lithosphere. C) Lithosphere, atmosphere, biosphere. D) Biosphere, hydrosphere, atmosphere. Show Answer Correct Answer: A) Atmosphere, lithosphere, hydrosphere. 21. ASSERTION:CFC's deplete the ozone layer.REASON:CFC's are used as refrigerants and in fire extinguishers. 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: A) Both A & R are true. R is the correct explanation of A. 22. The living and non-living things that live and need each other in a particular area. A) Ecosystem. B) Community. C) Population. D) Habitat. Show Answer Correct Answer: A) Ecosystem. 23. Increasing levels of carbon dioxide in the air is believed to cause ..... A) Global Warming. B) Water Pollution. C) Non-biodegradable waste. D) Recycling. Show Answer Correct Answer: A) Global Warming. 24. Which of the following is an example of an organism? A) A river. B) A chair. C) Air. D) A sunflower. Show Answer Correct Answer: D) A sunflower. 25. Which among the following statements is incorrect in view of the plants? A) They convert the solar energy into mechanical energy. B) They prepare their food from organic compounds. C) They are also called producers. D) They are the initial source of energy in a food chain. Show Answer Correct Answer: B) They prepare their food from organic compounds. ← PreviousNext →Related 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 5Class 10 Science Chapter 15 Our Environment Quiz 6Class 10 Science Chapter 15 Our Environment Quiz 7Class 10 Science Chapter 15 Our Environment Quiz 8Class 10 Science Chapter 15 Our Environment Quiz 9Class 10 Science Chapter 15 Our Environment Quiz 10Class 10 Science Chapter 15 Our Environment Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books