This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 6 Changes Around Us – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 6 Changes Around Us Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Change in which we can get back to original substance is called A) Reversible change. B) Irreversible change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reversible change. 2. Objects gain heat and ..... A) Expand. B) Contract. C) All the above. D) None of the above. Show Answer Correct Answer: A) Expand. 3. An object expands on: A) Heating. B) Cooling. C) Applying pressure. D) All of these. Show Answer Correct Answer: A) Heating. 4. On heating a substance it ..... A) Expands. B) Contracts. C) Breaks. D) Freezes. Show Answer Correct Answer: A) Expands. 5. Increase in the volume of substances on heating, the substance will show the change in, A) Extension. B) Expansion. C) Exclusion. D) None of the above. Show Answer Correct Answer: B) Expansion. 6. In some irreversible changes the internal structure of the substance does not change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Changing milk into curd A) Reversible. B) Irreversible. C) All the above. D) None of the above. Show Answer Correct Answer: B) Irreversible. 8. Burning wood is ..... change A) Reversible, chemical. B) Irreversible, chemical. C) Reversible, physical. D) Irreversible, physical. Show Answer Correct Answer: B) Irreversible, chemical. 9. What is an example of a reversible change? A) Freezing water. B) Burning wood. C) Rotting fruit. D) Exploding fireworks. Show Answer Correct Answer: A) Freezing water. 10. Which of the following is not a man-made change? A) Change of day and night. B) Burning of fuels. C) Drying of clothes. D) Tearing of paper. Show Answer Correct Answer: A) Change of day and night. 11. Select an irreversible change A) Freezing water to make ice. B) Boiling water and creating steam. C) Mixing flour in water. D) None of the above. Show Answer Correct Answer: C) Mixing flour in water. 12. Which of the following can NOT cause change? A) Mixing of two substances. B) Rubbing hands together. C) Heating a substance. D) Growth of an organism. Show Answer Correct Answer: B) Rubbing hands together. 13. Erosion is ..... A) A fast change to the earth's surface. B) A slow change to the earth's surface. C) Thanos snapping his fingers. D) None of the above. Show Answer Correct Answer: B) A slow change to the earth's surface. 14. Chemical example A) Cooking of egg. B) Breaking glass. C) All the above. D) None of the above. Show Answer Correct Answer: A) Cooking of egg. 15. Conversion of a liquid to vapour by heating is called ..... A) Evaporation. B) Condenstion. C) BOTH. D) None of the above. Show Answer Correct Answer: A) Evaporation. 16. When blood flows through the lungs, the ..... bonds with oxygen and carries it to the organs. A) Thrombin. B) Haemoglobin. C) Blood. D) Coffee. Show Answer Correct Answer: B) Haemoglobin. 17. Rolling of that A) Chemical change. B) Irreversible change. C) Reversible change. D) Slow change. Show Answer Correct Answer: C) Reversible change. 18. The process where the liquid changing into solid is called A) Evaporation. B) Condensation. C) Heating. D) Boiling. Show Answer Correct Answer: B) Condensation. 19. What is an irreversible change? A) Something you can change back. B) Something you cannot change back. C) All the above. D) None of the above. Show Answer Correct Answer: B) Something you cannot change back. 20. Which of these is a physical and irreversible change A) Evaporation of water. B) Breaking of a glass tumbler. C) Burning of paper. D) Lighting of an electric bulb. Show Answer Correct Answer: B) Breaking of a glass tumbler. 21. Which of the following describes a chemical property of a substance? A) A. Colourless. B) B. Odourless. C) C. A liquid at 20$^\circ$C. D) Reacts with oxygen. Show Answer Correct Answer: D) Reacts with oxygen. 22. Sea water is a A) Element. B) Mixture. C) Molecule. D) Compound. Show Answer Correct Answer: B) Mixture. 23. Chemical changes are always irreversible A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. Which one of the following is not an irreversible change: A) Ironing of clothes. B) Burning of incense sticks. C) Baking of cake. D) Rusting of steel gate. Show Answer Correct Answer: A) Ironing of clothes. 25. Is burning of wood reversible or irreversible change? A) Reversible Change. B) Irreversible Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Irreversible Change. ← PreviousNext →Related QuizzesClass 6 Science Chapter 6 Changes Around Us Quiz 1Class 6 Science Chapter 6 Changes Around Us Quiz 2Class 6 Science Chapter 6 Changes Around Us Quiz 3Class 6 Science Chapter 6 Changes Around Us Quiz 4Class 6 Science Chapter 6 Changes Around Us Quiz 5Class 6 Science Chapter 6 Changes Around Us Quiz 6Class 6 Science Chapter 6 Changes Around Us Quiz 7Class 6 Science Chapter 6 Changes Around Us Quiz 8Class 6 Science Chapter 6 Changes Around Us Quiz 9Class 6 Science Chapter 6 Changes Around Us Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books