This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The organ by which mammals breathe in air A) Gills. B) Skin. C) Lungs. D) None of the above. Show Answer Correct Answer: C) Lungs. 2. What is the main cause of air pollution? A) Vehicles. B) Factories. C) Burning. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. Air contains ..... oxygen A) 100%. B) 50%. C) 25%. D) 21%. Show Answer Correct Answer: D) 21%. 4. Air pressure ..... as altitude ..... A) Stays the same, decreases. B) Stays the same, increases. C) Decreases, increases. D) Increases, decreases. Show Answer Correct Answer: C) Decreases, increases. 5. Apart from the different gases what does air contain? A) Smoke. B) Water. C) Dust. D) Fire. Show Answer Correct Answer: C) Dust. 6. What is the percentage of Nitrogen in air? A) 72%. B) 75%. C) 78%. D) 79%. Show Answer Correct Answer: C) 78%. 7. Wind is A) Air around us. B) Rising hot air. C) Air in motion. D) None of these. Show Answer Correct Answer: C) Air in motion. 8. The major part of air which do not support burning is called A) Oxygen. B) Carbondioxide. C) Nitrogen. D) None of the above. Show Answer Correct Answer: C) Nitrogen. 9. Air is present in A) Atmosphere. B) Soil. C) Water. D) Everywhere. Show Answer Correct Answer: A) Atmosphere. 10. The layer of thin air around the earth is known as ..... A) Oxygen. B) Atmosphere. C) Nitrogen. D) Ozone layer. Show Answer Correct Answer: B) Atmosphere. 11. Earth is surrounded by a layer of gases called the ..... A) Atmosphere. B) Sun Shield. C) Athletics. D) Earthmosphere. Show Answer Correct Answer: A) Atmosphere. 12. Air is not present in A) Building. B) Ocean. C) Vaccum. D) Caves. Show Answer Correct Answer: C) Vaccum. 13. Plants cannot utilise which component of air directly? A) Oxygen. B) Nitrogen. C) Water vapour. D) Carbondioxide. Show Answer Correct Answer: B) Nitrogen. 14. Until the eighteenth century, people thought that air was just ..... substance. A) One. B) Many. C) All the above. D) None of the above. Show Answer Correct Answer: A) One. 15. Moisture in air is called as A) Atmosphere. B) Humidity. C) Respiration. D) None of the above. Show Answer Correct Answer: B) Humidity. 16. Air is a ..... of different gases. A) Solution. B) Mixture. C) Division. D) Separation. Show Answer Correct Answer: B) Mixture. 17. The component of air used by green plants to make their food, is ..... A) Ozone layer. B) Carbon dioxide. C) Hydrogen. D) Argon. Show Answer Correct Answer: B) Carbon dioxide. 18. Name the component of the air which support burning. A) Nitrogen. B) Carbon dioxide. C) Oxygen. D) Water vapour. Show Answer Correct Answer: C) Oxygen. 19. State true or false Sound can travel only in air ..... A) True. B) Speak. C) All the above. D) None of the above. Show Answer Correct Answer: B) Speak. 20. We can live without air. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. The ratio of nitrogen to oxygen in the air is A) 1:4. B) 4:1. C) 3:1. D) 1:2. Show Answer Correct Answer: B) 4:1. 22. Plants and animals are interdependent of each other. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Where is oxygen present? A) Wind. B) Water. C) Soil. D) All of the above. Show Answer Correct Answer: D) All of the above. 24. How do the animals breath in soil? A) There is air already present there. B) The animals makes hole in the soil and then let rain come and when the soil gets wet the air comes from under. C) The rain comes and then the holes are made by rain and by holes the air passes through it. D) The rain comes when the hole is made by rain and water is filled the bubbles come out and air fills. E) They blow up the air by their mouth in the hole. Show Answer Correct Answer: D) The rain comes when the hole is made by rain and water is filled the bubbles come out and air fills. 25. Arrange the jumbled words TUDS ..... A) Dust. B) Air. C) Water. D) None of the above. Show Answer Correct Answer: A) Dust. Next →Related QuizzesClass 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 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