This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. As we move higher in the atmosphere, the air gets ..... A) Increases. B) More. C) Rarer. D) None of the above. Show Answer Correct Answer: C) Rarer. 2. Nitrogen is ..... % A) 88%. B) 63%. C) 78%. D) 41%. E) 3333%. Show Answer Correct Answer: C) 78%. 3. The ..... makes the windmillrotate. A) Electricity. B) Wind. C) All the above. D) None of the above. Show Answer Correct Answer: B) Wind. 4. How much percentage of the air do oxygen and nitrogen take combined? A) 1%. B) 98%. C) 99%. D) 100%. Show Answer Correct Answer: C) 99%. 5. Which gas is released during respiration? A) Nitrogen. B) Oxygen. C) Carbon Dioxide. D) Hydrogen. Show Answer Correct Answer: C) Carbon Dioxide. 6. Component of air which support burning is called A) Oxygen. B) Water Vapour. C) Nitrogen. D) None of the above. Show Answer Correct Answer: A) Oxygen. 7. What is moving air called? A) Wind. B) Breeze. C) Storm. D) Oxygen. Show Answer Correct Answer: A) Wind. 8. ..... gas is necessary for burning A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: A) Oxygen. 9. The humidity of a place A) Is always more than 50 %. B) Is always less than 80%. C) Lies between 10-20%. D) Varies from time to time. Show Answer Correct Answer: D) Varies from time to time. 10. What do we inhale? A) Oxygen. B) Carbon Dioxide. C) Nothing. D) Everything. Show Answer Correct Answer: A) Oxygen. 11. People wear masks to protect their face from? A) Smoke. B) Dust. C) Germs. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. Makes up a small component of the air around us A) Oxygen. B) Carbondioxide. C) Water Vapour. D) None of the above. Show Answer Correct Answer: B) Carbondioxide. 13. During photosynthesis, plants take in A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) Carbon monoxide. Show Answer Correct Answer: C) Carbon dioxide. 14. ..... is used to generate electricity. A) Windmills. B) Carbonmills. C) Watermills. D) Soilmills. Show Answer Correct Answer: A) Windmills. 15. Why do you think mountaineer carry oxygen cylinders with them, while climbing high mountains? A) There is much air. B) They likes to carry that. C) There is less oxygen. D) All. Show Answer Correct Answer: C) There is less oxygen. 16. Formula of water A) H2O. B) CO2. C) Car. D) None of the Above. Show Answer Correct Answer: A) H2O. 17. The ozone layer protects us from the harmful rays of the sun A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Amount of nitrogen present in air is A) 21%. B) 78%. C) 32%. D) 52%. Show Answer Correct Answer: B) 78%. 19. Arrange the following in descending order according to their percentage:Nitrogen, Argon, Carbon dioxide, Oxygen A) Nitrogen > Argon > Oxygen > Carbon dioxide. B) Nitrogen > Oxygen > Argon > Carbon dioxide. C) Oxygen > Carbon dioxide > Nitrogen > Argon. D) Argon > Carbon dioxide. Show Answer Correct Answer: B) Nitrogen > Oxygen > Argon > Carbon dioxide. 20. Plants, animals and human beings use oxygen for A) Respiration. B) Living. C) Eating. D) Sleeping. Show Answer Correct Answer: A) Respiration. 21. Which of the following has most water vapour in the air A) Delhi. B) Mumbai. C) Rajasthan. D) All have an equal amount. Show Answer Correct Answer: B) Mumbai. 22. High up in the earth's atmosphere, in the region between about ..... km and about ..... km, is present a layer of ozone gas. A) 80, 50. B) 40, 90. C) 25, 78. D) 10, 50. Show Answer Correct Answer: D) 10, 50. 23. ..... supports burning and is necessary for living organisms. A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) Krypton. Show Answer Correct Answer: B) Oxygen. 24. Windmills are used to A) Draw water from tube wells. B) Run flour mills. C) Generate electricity. D) All the above. Show Answer Correct Answer: D) All the above. 25. Which gas is released during photosynthesis? A) Carbon Dioxide. B) Nitrogen. C) Oxygen. D) None of the above. Show Answer Correct Answer: C) Oxygen. ← 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 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 7Class 6 Science Chapter 15 Air Around Us Quiz 8Class 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