This quiz works best with JavaScript enabled. Home > Cbse > Class 6 > Science > Air Around Us > Class 6 Science Chapter 15 Air Around Us – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Air does not have weight A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. The undesirable substances are called ..... A) Pollutants. B) Pollotants. C) Pollutiontants. D) Pollution. Show Answer Correct Answer: A) Pollutants. 3. What gas is 21% in our air? A) Other gases. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: B) Oxygen. 4. Air is present in, atmosphere, water and ..... A) SOIL. B) FERTILIZERS. C) All the above. D) None of the above. Show Answer Correct Answer: A) SOIL. 5. What is a Wind vane used for? A) Creates wind. B) Helps the wind to flow. C) Makes the air clean. D) To show the direction of wind. Show Answer Correct Answer: D) To show the direction of wind. 6. Arrange the jumbled words MESKO ..... A) Mask. B) Smoke. C) Crown. D) Water. Show Answer Correct Answer: B) Smoke. 7. State true or false Air is a mixture of gases ..... A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. The presence of which of these components in the air varies from place to place? A) Oxygen. B) Carbon dioxide. C) Nitrogen. D) Water vapour. Show Answer Correct Answer: D) Water vapour. 9. The humans do not depend on plants for one of the following. This one is A) Carbon Dioxide. B) Oxygen. C) Fuel. D) Food. Show Answer Correct Answer: A) Carbon Dioxide. 10. Why does a lump of cotton wool shrink in water? A) It becomes heavy. B) The air molecules trapped in the fibres get replaced by water molecules. C) Both (a) and (b). D) None of the above. Show Answer Correct Answer: C) Both (a) and (b). 11. The gas essential for respiration is A) Hydrogen. B) Nitrogen. C) Oxygen. D) Carbon dioxide. Show Answer Correct Answer: C) Oxygen. 12. Who invented the watermill, which is a generator?? A) Researchers. B) Scientists. C) Physicians. D) Historians. Show Answer Correct Answer: A) Researchers. 13. Which gas does not support burning? A) Sulphur Dioxide. B) Methane. C) Nitrogen. D) Nitrous Oxide. Show Answer Correct Answer: C) Nitrogen. 14. Air is considered to be A) An element. B) A mixture. C) A solvent. D) A compound. Show Answer Correct Answer: B) A mixture. 15. Contains few gases and fire dust particles. A) Atmosphere. B) Vapour. C) Wind. D) Smoke. Show Answer Correct Answer: D) Smoke. 16. Which gas is the most common in our air? A) Hydrogen. B) Oxygen. C) Nitrogen. D) Helium. Show Answer Correct Answer: C) Nitrogen. 17. AIR IN MOTION IS CALLED ..... A) WIND. B) AIR. C) ATMOSPHERE. D) NONE OF THESE. Show Answer Correct Answer: A) WIND. 18. What gas in the air is causing global warming? A) Nitrogen. B) Oxygen. C) Argon. D) Carbon Doixide. Show Answer Correct Answer: D) Carbon Doixide. 19. Air has no role in water cycle. TRUE or FALSE? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 20. These are the principal agents of ozone depletion. A) Chlorofluorocarbons. B) Acid precipitation. C) Photochemical oxidants. D) None of the above. Show Answer Correct Answer: A) Chlorofluorocarbons. 21. Which of these can plants not absorb directly from the atmosphere. A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) All of these. Show Answer Correct Answer: B) Nitrogen. 22. Meaning of smoke A) Air with dust particles. B) Air pollution. C) Air we breath. D) Air with carbon-monoxide. Show Answer Correct Answer: A) Air with dust particles. 23. The layers of the atmosphere in order from bottom to top are A) Troposphere, mesosphere, atmosphere, thermosphere. B) Thermosphere, stratosphere, mesosphere, troposphere, exosphere. C) Troposphere, stratosphere, mesosphere, thermosphere, exosphere. D) Mesosphere, thermosphere, troposphere, stratosphere, exosphere. Show Answer Correct Answer: C) Troposphere, stratosphere, mesosphere, thermosphere, exosphere. 24. Which of these do plants need in order to make food? A) Oxygen. B) Argon. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 25. What is the percentage of nitrogen and oxygen in air? A) 98 %. B) 99 %. C) 97 %. D) 100 %. Show Answer Correct Answer: B) 99 %. 26. What percentage of carbon dioxide is there in air? A) 0.03%-0.09%. B) 21%. C) 0.92%. D) 0.5%-10%. Show Answer Correct Answer: A) 0.03%-0.09%. 27. What is the layer of air that surround Earth known as? A) Respiration. B) Atmosphere. C) Altitude. D) None of the above. Show Answer Correct Answer: B) Atmosphere. 28. Composition of Air? Page 92 thanujao A) Helium. B) Hydrogen. C) Nitrogen, Oxygen, Argon, Carbon Dioxide, Neon. D) Krypton. Show Answer Correct Answer: C) Nitrogen, Oxygen, Argon, Carbon Dioxide, Neon. 29. Air in motion is called wind A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 30. The precentage of which gas found in air is incorrect? A) Noble gases 0.95%. B) Carbon dioxide 0.03 %. C) Nitrogen 87%. D) Oxygen 21%. Show Answer Correct Answer: C) Nitrogen 87%. 31. What are the tiny mouths that lets the exchange in gasses A) Hydrilla. B) Nose. C) Stomata. D) Mouth. Show Answer Correct Answer: C) Stomata. 32. The presence of water vapor is Air is important for A) C. B) D. C) B. D) A. Show Answer Correct Answer: D) A. 33. Air helps in the dispersal of seeds and pollen of flowers of several plants. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 34. ..... is the process by which oxygen reacts with a fuel and releases heat energy A) Respiration. B) Oxygen cycle. C) None of these. D) Combustion. Show Answer Correct Answer: D) Combustion. 35. The layer of the atmosphere containing the ionosphere and auroras is A) Thermosphere. B) Mesosphere. C) Troposphere. D) Stratosphere. Show Answer Correct Answer: A) Thermosphere. 36. Why do mountaineers carry oxygen cylinders with them, while climbing high mountains? A) As we move up air becomes denser. B) At higher altitude air is dangerous. C) At higher altitude air is rarer. D) None of the above. Show Answer Correct Answer: C) At higher altitude air is rarer. 37. Earth is surrounded by an envelope of gases called the ..... A) Solar system. B) Cloud bubble. C) Hydrosphere. D) Atmosphere. Show Answer Correct Answer: D) Atmosphere. 38. HOW MUCH PERCENT OF OXYGEN IS IN THE AIR? A) 0.97%. B) 21%. C) 78%. D) 0.03%. Show Answer Correct Answer: B) 21%. 39. Windmills are also used to run flour mills. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. What is not true of Air?(a) It is odorless and colorless(b) It occupier space and has weight(c) it can be compressed and stored(d) None of these A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 41. ..... is a mixture of many Gases. A) Air. B) Plant. C) Atmosphere. D) None of the above. Show Answer Correct Answer: A) Air. 42. Which of these is a quality of air? A) Air takes up space. B) Air has a fixed shape. C) We can see air. D) None of the above. Show Answer Correct Answer: A) Air takes up space. 43. True Or FalseA policeman, controlling the traffic wears a mask to prevent the dust particles from entering his respiratory system through breathing. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 44. Which of these causes air pollution? A) Throwing litter here and there. B) Smoke from factories. C) Both of these. D) None of these. Show Answer Correct Answer: B) Smoke from factories. 45. Plants and animals need air to ..... A) Live. B) Drink. C) Smell. D) None of the above. Show Answer Correct Answer: A) Live. 46. Which of the following breathe through lung?? A) Grasshopper. B) Elephant. C) Fish. D) None of the above. Show Answer Correct Answer: B) Elephant. 47. Earth is enveloped by a layer of gas? A) Nitrogen. B) Atmoshphere. C) Cloud Bubble. D) Troposphere. Show Answer Correct Answer: B) Atmoshphere. 48. The layer of air which surrounds earth is called A) Atmosphere. B) Hydrosphere. C) Lithosphere. D) None of the above. Show Answer Correct Answer: A) Atmosphere. 49. The trees use ..... gas for breathing A) CO2. B) H2O. C) O2. D) NONE OF THESE. Show Answer Correct Answer: C) O2. 50. Which of the following are greenhouse gases? A) Carbon dioxide. B) Methane. C) Water vapor. D) All answers are correct. Show Answer Correct Answer: D) All answers are correct. 51. A layer of air called ..... surrounds the earth. A) Stratosphere. B) Troposphere. C) Atmosphere. D) None of the above. Show Answer Correct Answer: C) Atmosphere. 52. Which gases have 0.01% A) Argon, ozone, carbon di-oxide and hydrogen. B) Nitrogen. C) Oxygen. D) Air pollution. Show Answer Correct Answer: A) Argon, ozone, carbon di-oxide and hydrogen. 53. If the clothes of a person catch fire while working in the kitchen, which of the following should be used to cover the burning clothes of the person so as to extinguish fire? A) Nylon blanket. B) Polythene blanket. C) The teryls blanked. D) Woollen blanket. Show Answer Correct Answer: D) Woollen blanket. 54. Fig11.12 How does wind mill works? Page94 Leela A) Wind mills work by harnessing the power of water currents. B) Wind mills work by converting the kinetic energy of the wind into mechanical power, which can then be used to generate electricity. C) Wind mills work by using geothermal energy to generate power. D) Wind mills work by converting solar energy into electricity. Show Answer Correct Answer: B) Wind mills work by converting the kinetic energy of the wind into mechanical power, which can then be used to generate electricity. 55. ..... is an important ..... gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold. A) Carbon dioxide, Greenhouse. B) Argon, Natural. C) Oxygen, Greenhouse. D) Carbon dioxide, Natural. Show Answer Correct Answer: A) Carbon dioxide, Greenhouse. 56. Harmful substance in air, water, or soil are called ..... A) Pollutants. B) Particles. C) All the above. D) None of the above. Show Answer Correct Answer: A) Pollutants. 57. Can we feel Air? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 58. What holds the atmosphere on Earth so it doesn't drift away into space? A) Moonbeams. B) Sunlight. C) Water. D) Gravity. Show Answer Correct Answer: D) Gravity. 59. Sometimes you may have felt suffocation, why do you think so. A) Water Pollution. B) Air Pollution. C) Your lungs are broken. D) Oxygen Pollution. Show Answer Correct Answer: B) Air Pollution. 60. How much percentage do the gases excluding oxygen and nitrogen take up in the atmosphere? A) 100%. B) 1%. C) 2%. D) 55%. Show Answer Correct Answer: B) 1%. ← PreviousNext →Related QuizzesScience QuizzesClass 6 QuizzesClass 6 Science Chapter 15 Air Around Us Quiz 1Class 6 Science Chapter 15 Air Around Us Quiz 2Class 6 Science Chapter 15 Air Around Us Quiz 3Class 6 Science Chapter 15 Air Around Us Quiz 4Class 6 Science Chapter 15 Air Around Us Quiz 5Class 6 Science Chapter 15 Air Around Us Quiz 6Class 6 Science Chapter 15 Air Around Us Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books