This quiz works best with JavaScript enabled. Home > Cbse > Class 6 > Science > Changes Around Us > Class 6 Science Chapter 6 Changes Around Us – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 6 Changes Around Us Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In which an object may become different in its shape, size, position and at time, even in its composition known as A) Slow change. B) Physical change. C) Change. D) Irreversble change. Show Answer Correct Answer: C) Change. 2. Which of the following is an example of an irreversible change that takes place when heat is supplied? A) The expansion of iron. B) Transformation of water into vapour. C) Melting of ice. D) Burning of coal. Show Answer Correct Answer: D) Burning of coal. 3. Changes may occur- A) Only by mixing a substance with some other substance. B) Only by heating a substance. C) Both by heating a substance and by mixing it with some other. D) None of these options is correct. Show Answer Correct Answer: C) Both by heating a substance and by mixing it with some other. 4. Adding baking soda and vinegar together and it fizzes and creates carbon dioxide. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 5. A small quantity of curd is added to warm milk. The milk is stirred and is set aside undisturbed for a few hours at a warm place. In a few hours, the milk changes into curd. Is this change reversible? A) No, its Irreversible. B) The question is inappropriate. C) Yes, its reversible. D) I don't know. Show Answer Correct Answer: A) No, its Irreversible. 6. If boiling water is poured into thick glass, it often cracks. This is because ..... A) Of the unequal expansion and contraction of the inner and out glass layer. B) The outer glass layer expands more than the inner glass layer when in contact with water. C) The glass is very fragile. D) The difference in temperature between the inside and outside of glass in very big. Show Answer Correct Answer: A) Of the unequal expansion and contraction of the inner and out glass layer. 7. Expansion of iron on heating is which kind of change? A) Chemical. B) Desirable. C) Reversible. D) Both [b] and [c]. Show Answer Correct Answer: D) Both [b] and [c]. 8. Telephones or electric wires are made of a A) Metal. B) Iron. C) Allinum. D) Plastic. Show Answer Correct Answer: A) Metal. 9. A example of undesirable change A) A person falling sick. B) People dancing on stage. C) All the above. D) None of the above. Show Answer Correct Answer: A) A person falling sick. 10. 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. 11. Objects gain heat and ..... A) Expand. B) Contract. C) All the above. D) None of the above. Show Answer Correct Answer: A) Expand. 12. An object expands on: A) Heating. B) Cooling. C) Applying pressure. D) All of these. Show Answer Correct Answer: A) Heating. 13. On heating a substance it ..... A) Expands. B) Contracts. C) Breaks. D) Freezes. Show Answer Correct Answer: A) Expands. 14. 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. 15. 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. 16. Burning wood is ..... change A) Irreversible, chemical. B) Reversible, chemical. C) Reversible, physical. D) Irreversible, physical. Show Answer Correct Answer: A) Irreversible, chemical. 17. What is an example of a reversible change? A) Burning wood. B) Rotting fruit. C) Exploding fireworks. D) Freezing water. Show Answer Correct Answer: D) Freezing water. 18. 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. 19. 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. 20. 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. 21. 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. 22. 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. 23. When blood flows through the lungs, the ..... bonds with oxygen and carries it to the organs. A) Thrombin. B) Blood. C) Coffee. D) Haemoglobin. Show Answer Correct Answer: D) Haemoglobin. 24. The process where the liquid changing into solid is called A) Condensation. B) Evaporation. C) Heating. D) Boiling. Show Answer Correct Answer: A) Condensation. 25. Which of these is a physical and irreversible change A) Lighting of an electric bulb. B) Breaking of a glass tumbler. C) Burning of paper. D) Evaporation of water. Show Answer Correct Answer: B) Breaking of a glass tumbler. 26. Which of the following describes a chemical property of a substance? A) A. Colourless. B) Reacts with oxygen. C) B. Odourless. D) C. A liquid at 20$^\circ$C. Show Answer Correct Answer: B) Reacts with oxygen. 27. Chemical changes are always irreversible A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 28. 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. 29. Amoeba is a ..... organism. A) Unicellular. B) Cellular. C) All the above. D) None of the above. Show Answer Correct Answer: A) Unicellular. 30. What type of change is the bursting of a cracker? A) Reversible change. B) Irreversible change. C) Physical change. D) None of these. Show Answer Correct Answer: B) Irreversible change. 31. Change of seasons is a natural change. A) TURE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TURE. 32. Read each set of terms and identify the odd set A) Cow, milk, butter. B) Goat, milk, meat. C) Plant, vegetable, butter milk. D) Hen, meat, egg. Show Answer Correct Answer: C) Plant, vegetable, butter milk. 33. We eat ..... of cabbage. A) Seeds. B) Fruits. C) Stem. D) Leaves. Show Answer Correct Answer: D) Leaves. 34. To obtain salt which of these methods is used? A) Transpiration. B) Evaporation. C) Precipitation. D) Condensation. Show Answer Correct Answer: B) Evaporation. 35. BEST EXAMPLE OF CHEMICAL CHANGE A) BURNING OF PAPER. B) MELTING OF WAX. C) BREAKING GLASS. D) NONE OF THESE. Show Answer Correct Answer: A) BURNING OF PAPER. 36. What is the water cycle? A) The 3 forms of water. B) The movement of water on, above, or below the surface of the Earth. C) When water melts. D) When clouds form. Show Answer Correct Answer: B) The movement of water on, above, or below the surface of the Earth. 37. Substance contract on A) Bowls. B) Copper. C) Cooling. D) Wires. Show Answer Correct Answer: C) Cooling. 38. A potter working on his wheel. He shapes a lump of clay into a pot. Can this change be reversed. A) No. B) Yes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Yes. 39. When heat is added to a solid, it ..... A) Freezes. B) Expands. C) Contracts. D) Condenses. Show Answer Correct Answer: B) Expands. 40. Melting of a popsicle is a reversible change A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. Changes that occur around us can be grouped as A) Only irreversible. B) Only reversible. C) Physical. D) Either reversible or irreversible. Show Answer Correct Answer: D) Either reversible or irreversible. 42. Breaking of a glass A) Physical change. B) Fast change. C) Chemical change. D) Slow change. Show Answer Correct Answer: A) Physical change. 43. Rolling of chapati and baking of chapati are the changes that A) Can be reversed. B) Cannot be reversed. C) Can be reversed and cannot be reversed, respectively. D) Cannot be reversed and can be reversed, respectively. Show Answer Correct Answer: C) Can be reversed and cannot be reversed, respectively. 44. When metals are heated their molecules ..... energy A) Gain/Absorb. B) Loose. C) All the above. D) None of the above. Show Answer Correct Answer: A) Gain/Absorb. 45. Which of the following is/are irreversible change(s)? A) Burning of paper. B) Growth of plant. C) Cooking of food. D) All of these. Show Answer Correct Answer: D) All of these. 46. Wet clothes to dry clothes, is this chainge reversible? (yes / no) A) Yes. B) No. C) Don't know. D) None of the above. Show Answer Correct Answer: A) Yes. 47. Which is an irreversable change? A) Cutting paper. B) Wax melting. C) None of these. D) All. Show Answer Correct Answer: A) Cutting paper. 48. You boil water. it evaporates. is it reversible? A) Yes. B) No. C) Maybe. D) None of the above. Show Answer Correct Answer: A) Yes. 49. Cooking an egg is a ..... A) Irreversible. B) Reversible. C) Changes. D) None of the above. Show Answer Correct Answer: A) Irreversible. 50. The changes that occur in nature are called A) Hard changes. B) Desirabke changes. C) Natural changesb. D) None of the above. Show Answer Correct Answer: C) Natural changesb. 51. Can we get the salt back which is dossolved is water? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 52. Rusting of iron is a reversible change A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 53. Which of the following change will show expansion A) Burning of paper. B) Heating of sand. C) Heating of iron. D) Heating of wood. Show Answer Correct Answer: C) Heating of iron. 54. The burning of wood is A) Reversible. B) Irreversible. C) All the above. D) None of the above. Show Answer Correct Answer: B) Irreversible. 55. Rolling of chappathi and baking of chappathi are the changes that A) Can be reversed. B) Cannot be reversed. C) Can be reversed and cannot be reversed respectively. D) Cannot be reversed and can be reversed respectively. Show Answer Correct Answer: C) Can be reversed and cannot be reversed respectively. 56. HOW MANY CHANGES TAKE PLACE AROUND US A) 6. B) 5. C) 4. D) 7. Show Answer Correct Answer: A) 6. 57. Which of the following would be considered a physical change? A) Burning marshmellow. B) Roasting a Turkey. C) PH test. D) Cutting paper. Show Answer Correct Answer: D) Cutting paper. 58. What do you think Reversible change is? A) It is a Temporary change. B) It is a Lasting change. C) All the above. D) None of the above. Show Answer Correct Answer: A) It is a Temporary change. 59. Burning of fire crackers is the example for ..... A) Long chnges. B) Slow changes. C) Fast changes. D) None of the above. Show Answer Correct Answer: C) Fast changes. 60. An iron ring is heated. Which of the following statement about it is incorrect? A) The ring changes its shape. B) The ring almost comes to the same size on cooling. C) The change, in this case, is reversed. D) The ring expands and the change cannot be reversed. Show Answer Correct Answer: D) The ring expands and the change cannot be reversed. ← PreviousNext →Related QuizzesScience QuizzesClass 6 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books