This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which component of air holds 28% of air A) Argon. B) Carbon dioxide. C) Oxygen. D) None of the above. Show Answer Correct Answer: C) Oxygen. 2. Presence of water vapour in the atmosphere is important for the ..... A) Rotation. B) Water Cycle. C) Precipitation. D) Evaporation. Show Answer Correct Answer: B) Water Cycle. 3. What is the composition of Air? A) 78% Oxygen, 21% Water Vapour, Dust & Smoke, 1% Nitrogen. B) 78% Nitrogen, 21% Water Vapour, Dust & Smoke, 1% Oxygen. C) 78% Nitrogen, 21% Oxygen, 1% Water Vapour, Dust & Smoke, other gases. D) NONE OF THE ABOVE. Show Answer Correct Answer: C) 78% Nitrogen, 21% Oxygen, 1% Water Vapour, Dust & Smoke, other gases. 4. Which of the following is true about air? A) Air is heterogenous. B) Air is homogenous. C) Air is a compound. D) Air is an alloy. Show Answer Correct Answer: B) Air is homogenous. 5. Moving air is called ..... A) Breeze. B) Wind. C) Storm. D) None of the above. Show Answer Correct Answer: B) Wind. 6. Why plant need oxygen? A) They breath like human beings and animals. B) Plants also consume oxygen for respiration, but they produce more of it than they consume. That is why we say plants produce oxygen. C) For the process of the Photosynthesis there is 1 more ingredient needed that is oxygen that's why. D) Plants alsoconsume oxygen for respiration, butthey produce more of it than theyconsume. Show Answer Correct Answer: B) Plants also consume oxygen for respiration, but they produce more of it than they consume. That is why we say plants produce oxygen. 7. What causes acid rain (if you remember from last class)? A) Carbon Dioxide. B) Carbon Monoxide. C) Sulphur Dioxide. D) All of these. Show Answer Correct Answer: C) Sulphur Dioxide. 8. While deep under the sea, a deep sea diver cannot utilise the oxygen dissolved in sea water for breathing because he does not have A) Thin skin. B) Gills. C) Stomata. D) Breathing Tubes. Show Answer Correct Answer: B) Gills. 9. The components of air which is taken by Plants to prepare the food?(a) O$_{2}$(b) N$_{2}$(c) CO$_{2}$(d) None of these A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 10. The ozone layer absorbs ..... - ..... % of the UV radiation from the sun. A) 45-68. B) 86-78. C) 93-98. D) 93-99. Show Answer Correct Answer: D) 93-99. 11. The layer of gases around the earth is called as ..... A) Exosphere. B) Mesosphere. C) Thermosphere. D) None of the above. Show Answer Correct Answer: D) None of the above. 12. Which of the following is NOT present in air? A) Oxygen. B) Nitrogen. C) Helium. D) Iron. Show Answer Correct Answer: D) Iron. 13. Air occupies ..... A) Water. B) Weight. C) Space. D) None of the above. Show Answer Correct Answer: C) Space. 14. Air is an opaque material. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 15. In which layer of air is the Ozone layer present? A) Troposphere. B) Stratosphere. C) Mesosphere. D) Exosphere. Show Answer Correct Answer: B) Stratosphere. 16. The process of settling down of particles of a solid in a liquid is A) Sublimation. B) Sedimentation. C) Filtration. D) Decantation. Show Answer Correct Answer: B) Sedimentation. 17. The Gas present in the air in most quantity A) Carbon Dioxide. B) Water Vapour. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: C) Nitrogen. 18. What gas is present in balloons? A) Carbon Dioxide. B) Hydrogen. C) Oxygen. D) Helium. Show Answer Correct Answer: D) Helium. 19. How much percentage of nitrogen is present in the air? A) 21%. B) 4%. C) 78%. D) 33%. Show Answer Correct Answer: C) 78%. 20. Which of these is called a storm? A) A light wind. B) A moving wind. C) A strong wind. D) None of the above. Show Answer Correct Answer: C) A strong wind. 21. The animal breath what? A) Carbon dioxide. B) Oxygen. C) Dissolved oxygen. D) Nitrogen. E) All of the above. Show Answer Correct Answer: C) Dissolved oxygen. 22. Air is blue in colour. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 23. Carbon dioxide is used for A) Respiration. B) Breathing. C) Photosynthesis. D) Transpiration. Show Answer Correct Answer: C) Photosynthesis. 24. Which gas is produced by plants during respiration? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) Argon. Show Answer Correct Answer: C) Carbon dioxide. 25. Which type of animals have breathing system both for water and air? A) Amphibians. B) Mammals. C) Reptiles. D) None of the above. Show Answer Correct Answer: A) Amphibians. ← PreviousNext →Related 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 5Class 6 Science Chapter 15 Air Around Us Quiz 6Class 6 Science Chapter 15 Air Around Us Quiz 7Class 6 Science Chapter 15 Air Around Us Quiz 8Class 6 Science Chapter 15 Air Around Us Quiz 9Class 6 Science Chapter 15 Air Around Us Quiz 10Class 6 Science Chapter 15 Air Around Us Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books