This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Geography > Air > Class 7 Geography Chapter 4 Air – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Geography Chapter 4 Air Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The ozone layer is damaged by (a) A) A. CFCs. B) Increase in greenhouse gases. C) Increased global temperatures. D) Sulfuric and nitric acids. Show Answer Correct Answer: A) A. CFCs. 2. Air becomes dirty because of dust and ..... gases. A) Harmful. B) Colourful. C) Fresh. D) Useful. Show Answer Correct Answer: A) Harmful. 3. In rainy season brown layer appears on iron objects, which part of air reacts with iron to form this layer? A) Carbon dioxide. B) Nitrogen. C) Oxygen. D) None of the above. Show Answer Correct Answer: C) Oxygen. 4. The main gas for breathe is A) Oxygen. B) Argon. C) Hydrogen. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 5. Which among the following is the secondary air pollutants? A) Hydrocarbons. B) Nitrogen oxides. C) Smog. D) Particulate matter. Show Answer Correct Answer: C) Smog. 6. What do we have to fasten on the plane? A) The safe belt. B) The security belt. C) The conveyor belt. D) The safety belt. Show Answer Correct Answer: D) The safety belt. 7. Air exects ..... on objects A) Pressure. B) Space. C) Mass. D) None of the above. Show Answer Correct Answer: A) Pressure. 8. In this layer of the atmosphere, meteoroids slow down and burn up. A) Troposphere. B) Mesosphere. C) Stratosphere. D) Exosphere. Show Answer Correct Answer: B) Mesosphere. 9. The ..... in the air causes rainfall. A) Oxygen. B) Water vapour. C) Nitrogen. D) None of the above. Show Answer Correct Answer: B) Water vapour. 10. Is air a mixture or compound? A) Mixture. B) Compound. C) All the above. D) None of the above. Show Answer Correct Answer: A) Mixture. 11. A ..... is a large body of air in the lower atmosphere that has similar temperature, humidity, and air pressure. A) Jet Stream. B) Front. C) Air Mass. D) Continental. Show Answer Correct Answer: C) Air Mass. 12. If you were walking from 988mb to 1012 mb which of the following is true? A) You are facing the wind as you walk. B) The air pressure is decreasing. C) You are walking uphill. D) The wind is getting stronger as you get closer to C. Show Answer Correct Answer: A) You are facing the wind as you walk. 13. ..... protective layer protects earth from the UV rays from Sun. A) CFCs. B) Ozone Layer. C) All the above. D) None of the above. Show Answer Correct Answer: B) Ozone Layer. 14. Which is the lowermost layer of atmosphere A) Stratosphere. B) Thermosphere. C) Troposphere. D) Mesosphere. Show Answer Correct Answer: C) Troposphere. 15. Which of these molecules is not an air pollutant? A) CO. B) SO$_{2}$. C) NO$_{2}$. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 16. Air contains ..... gases, water vapour, smoke, dust particles, and germs. A) No. B) Many. C) Two. D) None of the above. Show Answer Correct Answer: B) Many. 17. Air is needed for breathing. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Which of the answers below is NOT considered a pollutant? A) Trash. B) Fertilizers. C) Compost. D) Chemicals in batteries. Show Answer Correct Answer: C) Compost. 19. Cold air is more ..... than warm air A) Dense. B) Stale. C) Colorful. D) None of the above. Show Answer Correct Answer: A) Dense. 20. What was the plane's name that Amelia Earhart was on during her trip across the Atlantic ocean? A) '' The Clover Ship". B) "Antla 3". C) "Rocker 312". D) "The Friendship". Show Answer Correct Answer: D) "The Friendship". 21. What are we learing about? A) Animals. B) Boats. C) Cars. D) Airplanes. Show Answer Correct Answer: D) Airplanes. 22. Airplanes fly only because their engines push them up. A) No. B) Yes. C) Hmmm Not sure . D) None of the above. Show Answer Correct Answer: A) No. 23. What type of refrigerant is R134a? A) HSBC. B) HFC. C) CFC. D) HCFC. Show Answer Correct Answer: B) HFC. 24. All Living things breathe in ..... and breathe out ..... A) Oxygen, carbon dioxide. B) Carbon dioxide, oxygen. C) Oxygen, nitrogen. D) Nitrogen, carbon dioxide. Show Answer Correct Answer: A) Oxygen, carbon dioxide. 25. Water vapour maximizes the rate of evaporation. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. The gas that is converted into a usable form by bacteria present in soil A) Hydrogen. B) Oxygen. C) Helium. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 27. If a leaf blows up in the air where is there more air pressure? A) Under the leaf. B) Above the leaf. C) To the right of the leaf. D) To the left of the leaf. Show Answer Correct Answer: A) Under the leaf. 28. An air mass classified as mP usually forms over which type of Earth surface? A) Warm ocean. B) Cool ocean. C) Warm land. D) Cool land. Show Answer Correct Answer: B) Cool ocean. 29. The percentage of Argon gas in air A) 0.04%. B) 0.07%. C) 0.93%. D) 20.95%. Show Answer Correct Answer: C) 0.93%. 30. Tree plantation was done near the Taj Mahal to ..... A) Minimize the effect of pollution. B) Make it more beautiful. C) Make it cleaner. D) None of the above. Show Answer Correct Answer: A) Minimize the effect of pollution. 31. The amount of carbon dioxide that is present in our atmosphere is A) 3%. B) 0.03%. C) 21%. D) 78%. Show Answer Correct Answer: B) 0.03%. 32. Which statement is incorrect? A) Air Pollution is good for living beings. B) Carbon dioxide has more affinity for haemoglobin than oxygen. C) Acid rain is a result of air pollution. D) Sulphur dioxide causes breathing trouble. Show Answer Correct Answer: A) Air Pollution is good for living beings. 33. After sedimentation, the action of pouring clear water out into another container is called distillation. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 34. Which type of air mass brings WARM and DRY weather? A) Continental Tropical (cT). B) Maritime Polar (mP). C) Maritime Tropical (mT). D) Continental Polar (cP). Show Answer Correct Answer: A) Continental Tropical (cT). 35. A radioactive gas that can build up in homes. A) Uranium. B) Radon. C) Oxygen. D) Helium. Show Answer Correct Answer: B) Radon. 36. What is the function of the ozone layer? A) To allow UV rays to get to Earth. B) To block UV rays from getting to Earth. C) To keep oxygen in. D) To allow meteors to get to Earth. Show Answer Correct Answer: B) To block UV rays from getting to Earth. 37. ANYTHING THAT OCCUPIES SPACE AND HAS MASS IS CALLED ..... A) MATTER. B) ENVIRONMENT. C) ATMOSPHERE. D) AIR. Show Answer Correct Answer: A) MATTER. 38. High pressure will usually bring what kind of weather? A) Clear and dry. B) Cloudy and wet. C) All the above. D) None of the above. Show Answer Correct Answer: A) Clear and dry. 39. Balance of oxygen and carbon dioxide in air is maintained by ..... A) Plants only. B) Animals only. C) Both plants and animals. D) Moving vechiles. Show Answer Correct Answer: C) Both plants and animals. 40. Which is an effect of acid rain? A) Asthma. B) Cleaner freshwater. C) Destroyed forests and trees. D) Increased manufacturing. Show Answer Correct Answer: C) Destroyed forests and trees. 41. Air pollution is when unwanted chemicals, gasses, and particles enter the air and the atmosphere causing harm to animals and damaging the natural cycles of the Earth. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. A person who travels on a plane is ..... A) Client. B) Customer. C) Cabin crew. D) Passenger. Show Answer Correct Answer: D) Passenger. 43. Which gas is needed for photosynthesis A) Hydrogen. B) Oxygen. C) Carbon dioxide. D) Nitrogen. Show Answer Correct Answer: C) Carbon dioxide. 44. Moist air is ..... than dry air. A) Lighter. B) Heavier. C) All the above. D) None of the above. Show Answer Correct Answer: A) Lighter. 45. How many types of air is there? A) 9. B) 1. C) 5. D) 102. Show Answer Correct Answer: B) 1. 46. Which of the following is a cause to air pollution? A) Vehicles. B) Nasal irritation. C) Recycle. D) Eye irritation. Show Answer Correct Answer: A) Vehicles. 47. To show the presence of water vapour in air, wipe the glass tumbler from outside so that, A) No water is sticking to it. B) No chemical is sticking to it. C) No Limewater is sticking to it. D) None. Show Answer Correct Answer: A) No water is sticking to it. 48. Choose the WRONG action. A) We should cover our mouth while sneezing. B) We should keep our towel separate from others. C) We should open our mouth while sneezing. D) We should wash our hands with soap after sneezing. Show Answer Correct Answer: C) We should open our mouth while sneezing. 49. How much is the percentage of CO$_{2 }$in air? A) 21. B) 0.03. C) All the above. D) None of the above. Show Answer Correct Answer: B) 0.03. 50. What do we call the activity of regular travelling there and back in one day-to school or to work? A) Comoning. B) Converting. C) Communing. D) Commuting. Show Answer Correct Answer: D) Commuting. 51. Plants take in air through tiny holes called ..... A) Sun. B) Ball. C) Stomata. D) Balloons. Show Answer Correct Answer: C) Stomata. 52. In a high pressure area, the weather will likely be A) Cooler and clear skies. B) Warm but cloudy. C) Cold and rainy. D) Snowy and clear. Show Answer Correct Answer: A) Cooler and clear skies. 53. What helps oxygen to be absorbed rapidly into the blood in the lungs? A) Air breathed in has less oxygen than air breathed out. B) Alveoli have thick walls and a large surface area. C) Alveoli have thin walls and a large surface area. D) The concentration of oxygen in the blood is higher than in the alveoli. Show Answer Correct Answer: C) Alveoli have thin walls and a large surface area. 54. Which of these materials do you predict would have the MOST amount of friction? A) Metal. B) Tile. C) Sand paper. D) Denim. Show Answer Correct Answer: C) Sand paper. 55. Ventilation is one of the major control to be taken to reduce A) Air pollution. B) Sick building syndrome. C) Indoor air pollution. D) Noise pollution. Show Answer Correct Answer: C) Indoor air pollution. 56. What are the two processes that add carbon dioxide into the atmosphere A) Photosynthesis. B) Respiration and photosynthesis. C) Respiration and decomposition. D) None of the above. Show Answer Correct Answer: C) Respiration and decomposition. 57. When air moves it is called wind. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 58. What does COSHH stand for? A) Control of Substances which are health hazardous. B) Control of solutions hazardous to health. C) Control of Substances Hazardous tohealth. D) Company omissions of safe Health hazards. Show Answer Correct Answer: C) Control of Substances Hazardous tohealth. 59. CUTTING DOWN OF TREES CAUSES ..... A) GASES. B) BURNING. C) AIR POLLUTION. D) CHEMICALS. Show Answer Correct Answer: C) AIR POLLUTION. 60. Nitrogen is utilized by? A) Animals. B) Humans. C) Plants. D) None of the above. Show Answer Correct Answer: C) Plants. ← PreviousNext →Related QuizzesGeography QuizzesClass 7 QuizzesClass 7 Geography Chapter 4 Air Quiz 1Class 7 Geography Chapter 4 Air Quiz 2Class 7 Geography Chapter 4 Air Quiz 3Class 7 Geography Chapter 4 Air Quiz 4Class 7 Geography Chapter 4 Air Quiz 5Class 7 Geography Chapter 4 Air Quiz 6Class 7 Geography Chapter 4 Air Quiz 7Class 7 Geography Chapter 4 Air Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books