This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Our Environment > Class 10 Science Chapter 15 Our Environment – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 15 Our Environment Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a landfill? A) A place where oil spills begin. B) A type of factory. C) A place for people to recycle. D) A place where people's trash is taken. Show Answer Correct Answer: D) A place where people's trash is taken. 2. 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. 3. 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. 4. How much amount of energy is transferred to each trophic level A) 90%. B) 20%. C) 10%. D) 30%. Show Answer Correct Answer: C) 10%. 5. Sources of energy that took millions of years to form. A) Fossil Fuels. B) Geothermal Energy. C) Renewable Energy. D) Nuclear Energy. Show Answer Correct Answer: A) Fossil Fuels. 6. What does the Ozone in the atmosphere do? A) Causes acid rain. B) Protects the Earth from harmful infrared (IR) rays. C) Protects the Earth from harmful ultraviolet (UV) rays. D) Causes the greenhouse effect. Show Answer Correct Answer: C) Protects the Earth from harmful ultraviolet (UV) rays. 7. 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. 8. The major components of physical environment are ..... A) Atmosphere, lithosphere, hydrosphere. B) Biosphere, hydrosphere, atmosphere. C) Lithosphere, atmosphere, biosphere. D) Atmosphere, biosphere, lithosphere. Show Answer Correct Answer: A) Atmosphere, lithosphere, hydrosphere. 9. 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. 10. The living and non-living things that live and need each other in a particular area. A) Habitat. B) Population. C) Community. D) Ecosystem. Show Answer Correct Answer: D) Ecosystem. 11. Increasing levels of carbon dioxide in the air is believed to cause ..... A) Recycling. B) Global Warming. C) Water Pollution. D) Non-biodegradable waste. Show Answer Correct Answer: B) Global Warming. 12. Which of the following is an example of an organism? A) A sunflower. B) Air. C) A river. D) A chair. Show Answer Correct Answer: A) A sunflower. 13. 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. 14. Which country has emitted the most CO2 over time? In other words, which nation has the most responsibility for the greenhouse gases that are currently residing in the atmosphere? A) India. B) Saudi Arabia. C) USA. D) China. E) Russia. Show Answer Correct Answer: C) USA. 15. Ozone shields the surface of earth from: A) Infra red rays. B) UV rays. C) X-rays. D) All. Show Answer Correct Answer: B) UV rays. 16. Select man-made ecosystem A) Aquarium. B) Gardens. C) Both of these. D) None of these. Show Answer Correct Answer: C) Both of these. 17. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of ..... ? A) Heat energy. B) Mechanical energy. C) Chemical energy. D) Light energy. Show Answer Correct Answer: C) Chemical energy. 18. The main constituents of atmosphere are: A) N2 and O2. B) CO2 and N2. C) CO and CO2. D) More when bad. Show Answer Correct Answer: A) N2 and O2. 19. A ..... is considered a terrestrial ecosystem A) Ocean. B) Forest. C) Pond. D) Underground caves. Show Answer Correct Answer: B) Forest. 20. What might happen to the river basin system in your community if a factory continuously dumps toxins into the local river? A) Mutations will occur. B) Thermal pollution will cause the temperature to increase. C) Dissolved oxygen levels would be high. D) The turbidity level will be low. Show Answer Correct Answer: A) Mutations will occur. 21. Ecology is one of topic in Biology subject. What is exactly the main point of ecology? A) Intra-species and inter-species interaction. B) Behavior of organism as individual. C) Interaction between organisms and environment. D) Behavior of organisms in one population. Show Answer Correct Answer: C) Interaction between organisms and environment. 22. In the biosphere energy and matter move A) Both move unidirectionally. B) Both move circularly. C) Energy unidirectionally and matter circularly. D) Energy unidirectionally and matter unidirectionally. Show Answer Correct Answer: C) Energy unidirectionally and matter circularly. 23. What percentage of energy is passed on to next tropic level? A) 50%. B) 90%. C) 100%. D) 10%. Show Answer Correct Answer: D) 10%. 24. ASSERTION(A):Green plants of ecosystem are the transducers.REASON(R):Producers trap the radiant energy of the sun and convert it into chemical energy. 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. 25. In food chain, small carnivores fall at ..... level. A) Pear. B) Fth. C) 1 stem. D) An offer. Show Answer Correct Answer: D) An offer. 26. The very quick increase in the number of individuals in a population. A) Population Explosion. B) Carrying Capacity. C) Sustainable Growth. D) Overpopulation. Show Answer Correct Answer: D) Overpopulation. 27. Sun is known as the most important source of life in earth. Below there are sun's roles in energy flow, except A) Sun helps plant to do respiration. B) Sunlight is the main source for plants to create sugar as food. C) Helping photosynthetic organisms converting inorganic matters to organic matter. D) Sunlight helps plant to liberate oxygen from water. Show Answer Correct Answer: A) Sun helps plant to do respiration. 28. Omnivores belong to which trophic level of food chain A) May vary in their position. B) Always T$_{4}$. C) Always T$_{3}$. D) Always T$_{2}$. Show Answer Correct Answer: A) May vary in their position. 29. What is one of the greatest threats to biodiversity on Earth? A) Loss of drinking water. B) Habitat destruction. C) Decrease in food supply. D) Biomagnification. Show Answer Correct Answer: B) Habitat destruction. 30. What is the job of a decomposer? A) To break down dead plants and animals. B) Plants for animals to feed of from. C) Plants for animals to feed of from. D) To produce energy to the plants. Show Answer Correct Answer: A) To break down dead plants and animals. 31. Replacing of plastic cups by paper cups for selling tea on train is prefered because A) Paper cups are more aesthetic. B) Paper cups are more hygienic. C) Paper cups are cheaper. D) Paper cups are biodegradable and eco-friendly. Show Answer Correct Answer: D) Paper cups are biodegradable and eco-friendly. 32. What are the major causes of sea level rise? A) Melting glaciers and ice sheets. B) Rivers accelerating. C) Seawater expanding as it gets warmer. D) Rocks and soil washing into the sea. Show Answer Correct Answer: A) Melting glaciers and ice sheets. 33. The zone where life exists is known as ..... A) Atmosphere. B) Hydrosphere. C) Biosphere. D) Lithosphere. Show Answer Correct Answer: C) Biosphere. 34. Which of the following are parts of the atmosphere? A) Troposphere. B) Stratosphere. C) Thermosphere. D) All of the above. Show Answer Correct Answer: D) All of the above. 35. Chemical formula of ozone A) O. B) O1. C) Be. D) O2. Show Answer Correct Answer: C) Be. 36. ASSERTION:A network of food chains existing together in an ecosystem is known as food web.REASON:An animal like kite cannot be a part of food web. 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: C) A is true but R is false. 37. All the interacting organisms in an area together with the non-living constituents of the environment form a/an ..... A) Forest. B) Nature. C) Ecosystem. D) City. Show Answer Correct Answer: C) Ecosystem. 38. An energy is passed from one trophic level to another, the amount of usable energy A) Increases. B) Energy is not passed from one trophic level to another. C) Remains the same. D) Decreases. Show Answer Correct Answer: D) Decreases. 39. Which of the following is not a renewable source of energy? A) Sun energy. B) Nuclear Energy. C) Wind Energy. D) All are renewable sources. Show Answer Correct Answer: B) Nuclear Energy. 40. What is the cause of acid rain? A) Water run off. B) Bio-magnification. C) Combustion. D) Deforestation. Show Answer Correct Answer: C) Combustion. 41. A process in which mixed garbage is burned at very high temperatures is: A) Incineration. B) Leachate. C) Source reduction. D) Recovery. Show Answer Correct Answer: A) Incineration. 42. Which of the following helps in material cycling in an ecosystem? A) Green Plants and Bacteria. B) Bacteria and fungi. C) Bacteria and animals. D) Fungi and animals. Show Answer Correct Answer: B) Bacteria and fungi. 43. In a biosphere, which of the following is the ultimate source of energy A) Sunlight. B) Nitrogen. C) Water. D) Carbon. Show Answer Correct Answer: A) Sunlight. 44. Energy efficient vehicles and appliances use ..... A) More energy. B) No energy. C) Less energy. D) Much energy. Show Answer Correct Answer: C) Less energy. 45. What is Biodiversity? A) Sum total of all the similar species found in an ecosystem. B) Total of differences in the same species in an ecosystem. C) The variety of different organ systems within multicellular organisms. D) Sum total of all the different species found in an ecosystem. Show Answer Correct Answer: D) Sum total of all the different species found in an ecosystem. 46. What is the solid crust of the Earth is called? A) Lithosphere. B) Biosphere. C) Hydrosphere. D) Atmosphere. Show Answer Correct Answer: A) Lithosphere. 47. Global warming will cause an increase of ..... A) Heat Waves. B) Hurricanes. C) Floods. D) All of them are true. Show Answer Correct Answer: D) All of them are true. 48. The formula of ozone is A) O. B) Be. C) O4. D) O2. Show Answer Correct Answer: B) Be. 49. The physical environment comprises of ..... components A) Biotic. B) Ecological. C) Hydrosphere. D) Abiotic. Show Answer Correct Answer: A) Biotic. 50. Which level of the food chain is most affected by biomagnifications? A) Primary consumers. B) Tertiary consumers. C) Secondary consumers. D) Producers. Show Answer Correct Answer: B) Tertiary consumers. 51. Environment consist of the ..... that surrounds any living organism. A) Place. B) People. C) Things. D) Living and non living things. Show Answer Correct Answer: D) Living and non living things. 52. You can ..... plastic bags again and again until they get holes in them. A) Resume. B) Reuse. C) Reduce. D) Rewaste. Show Answer Correct Answer: B) Reuse. 53. What is the life supporting system among the following? A) Transportation. B) Music system. C) Environment. D) None of the above. Show Answer Correct Answer: C) Environment. 54. Which one of the following pairs belong to the category of primary consumers? A) Eagle and snake. B) Grasshoppers & cattle. C) Snake and frog. D) Water beetles & fish. Show Answer Correct Answer: B) Grasshoppers & cattle. 55. How many types of tropic level are present in a food chain A) 6. B) 2. C) 4. D) 1. Show Answer Correct Answer: C) 4. 56. Which one of the following is an artificial ecosystem? A) Crop field. B) Forest. C) Pond. D) Lake. Show Answer Correct Answer: A) Crop field. 57. The place in which a plant, animal, bird or fish normally lives is its ..... A) Habitat. B) Eco-community. C) Eco-friendly. D) Food chain. Show Answer Correct Answer: A) Habitat. 58. The fertility level of any soil is generally determined by A) Humus Content. B) Aeration. C) Mineral Level. D) All of these. Show Answer Correct Answer: D) All of these. 59. What is a non-biodegradable substance? A) Substances that are not recyclable. B) Substances that cannot be decomposed easily. C) Substances that can be decomposed easily. D) Substances that are recyclable. Show Answer Correct Answer: B) Substances that cannot be decomposed easily. 60. What is the greenhouse effect? A) Life on Earth 'exhales' gas that warms up the atmosphere. B) Certain gases in the atmosphere trap heat and warm the Earth. C) The tilt of the Earth changes the amount of solar energy the Earth receives. D) The Sun is putting out more radiant energy over time. Show Answer Correct Answer: B) Certain gases in the atmosphere trap heat and warm the Earth. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 15 Our Environment Quiz 1Class 10 Science Chapter 15 Our Environment Quiz 3Class 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