This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Geography Chapter 4 Air – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Geography Chapter 4 Air Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A ..... is a large body of air in the lower atmosphere that has similar temperature, humidity, and air pressure. A) Front. B) Air Mass. C) Continental. D) Jet Stream. Show Answer Correct Answer: B) Air Mass. 2. If you were walking from 988mb to 1012 mb which of the following is true? A) You are walking uphill. B) The air pressure is decreasing. C) You are facing the wind as you walk. D) The wind is getting stronger as you get closer to C. Show Answer Correct Answer: C) You are facing the wind as you walk. 3. ..... 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. 4. Which is the lowermost layer of atmosphere A) Troposphere. B) Stratosphere. C) Mesosphere. D) Thermosphere. Show Answer Correct Answer: A) Troposphere. 5. Which of these molecules is not an air pollutant? A) NO$_{2}$. B) Oxygen. C) CO. D) SO$_{2}$. Show Answer Correct Answer: B) Oxygen. 6. 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. 7. Air is needed for breathing. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. Which of the answers below is NOT considered a pollutant? A) Chemicals in batteries. B) Fertilizers. C) Compost. D) Trash. Show Answer Correct Answer: C) Compost. 9. Cold air is more ..... than warm air A) Dense. B) Stale. C) Colorful. D) None of the above. Show Answer Correct Answer: A) Dense. 10. We can ..... air. A) See. B) Touch. C) Taste. D) Feel. Show Answer Correct Answer: D) Feel. 11. What was the plane's name that Amelia Earhart was on during her trip across the Atlantic ocean? A) "Rocker 312". B) "Antla 3". C) "The Friendship". D) '' The Clover Ship". Show Answer Correct Answer: C) "The Friendship". 12. What are we learing about? A) Cars. B) Boats. C) Animals. D) Airplanes. Show Answer Correct Answer: D) Airplanes. 13. Which is the wrong statement? A) Air is present everywhere. B) Plants breathe through gills. C) Air can give shape to things. D) Air helps in burning things. Show Answer Correct Answer: B) Plants breathe through gills. 14. 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. 15. What type of refrigerant is R134a? A) CFC. B) HCFC. C) HSBC. D) HFC. Show Answer Correct Answer: D) HFC. 16. 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. 17. 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. 18. The gas that is converted into a usable form by bacteria present in soil A) Oxygen. B) Helium. C) Nitrogen. D) Hydrogen. Show Answer Correct Answer: C) Nitrogen. 19. 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. 20. 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. 21. The percentage of Argon gas in air A) 0.93%. B) 20.95%. C) 0.07%. D) 0.04%. Show Answer Correct Answer: A) 0.93%. 22. 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. 23. The amount of carbon dioxide that is present in our atmosphere is A) 78%. B) 21%. C) 3%. D) 0.03%. Show Answer Correct Answer: D) 0.03%. 24. Which statement is incorrect? A) Carbon dioxide has more affinity for haemoglobin than oxygen. B) Sulphur dioxide causes breathing trouble. C) Acid rain is a result of air pollution. D) Air Pollution is good for living beings. Show Answer Correct Answer: D) Air Pollution is good for living beings. 25. 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. ← PreviousNext →Related 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 8Class 7 Geography Chapter 4 Air Quiz 9Class 7 Geography Chapter 4 Air Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books