This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction? A) Heat is added to the sugar crystals. B) The sugar melts and becomes a liquid. C) Gas is produced as the sugar turns black. D) No evidence of chemical reaction is present. Show Answer Correct Answer: C) Gas is produced as the sugar turns black. 2. Ripping paper A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 3. Frying an egg A) Physcial change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 4. A characteristic that you can observe directly or measure with a tool such as mass, size, shape, color, texture, and volume A) Chemical property. B) Physical property. C) Chemical change. D) Physical change. Show Answer Correct Answer: B) Physical property. 5. Breaking food down with the use of enzymes is known as: A) Chemical Digestion. B) Physical Digestion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Digestion. 6. If a glass beaker hits the floor and breaks, what should you do? A) Run around yelling that something has broken. B) Clean up the glass yourself. C) Put your hand up and ask for the teachers assistance. D) None of the above. Show Answer Correct Answer: C) Put your hand up and ask for the teachers assistance. 7. Which action would cause the weight of an object or substance to decrease? A) Burning it. B) Stirring it. C) Freezing it. D) Dissolving it. Show Answer Correct Answer: A) Burning it. 8. Which is NOT evidence of a chemical change? A) Unexpected color change. B) Gas produced. C) Melting. D) Temperature change. Show Answer Correct Answer: C) Melting. 9. What does a chemical change result in? A) A change in state of the substance (ex. liquid to solid). B) A change in texture of the substance. C) A change in the way atoms are bonded to each other. D) A change in the appearance of the substance. Show Answer Correct Answer: C) A change in the way atoms are bonded to each other. 10. An element is a substance that cannot be split into simpler substances by chemical methods. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. Cyanides' toxicity is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: C) Chemical Property. 12. Mark is observing a burning candle. He notices the melted wax drips down the side of the candle and hardens again. The candle has ..... A) Formed a new substance. B) Undergone a physical change. C) Undergone a chemical change. D) Undergone a physical and chemical change. Show Answer Correct Answer: B) Undergone a physical change. 13. When one substance reacts with another it is a ..... change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 14. Fireworks Exploding are a ..... change. A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 15. The amount of matter in something is A) Matter. B) Mass. C) Dissolve. D) Solubility. Show Answer Correct Answer: B) Mass. 16. Which of these scientific tools is essential for testing the Law of Conservation of matter? A) Spring Scale. B) Metric Ruler. C) Balance. D) Graduated Cylinder. Show Answer Correct Answer: C) Balance. 17. ..... is an example of both a color change and new substance produced from a chemical change with oxygen and metal. A) Shredded paper. B) Rust (iron oxide). C) Wood chips. D) Melted wax. Show Answer Correct Answer: B) Rust (iron oxide). 18. What can you infer about the changes that formed the Grand Canyon? A) They were molecular changes. B) They were chemical changes. C) They were physical changes. D) They were changes in weather. Show Answer Correct Answer: C) They were physical changes. 19. Which is an example of an element found in nature? A) Cars. B) Beef. C) Glass. D) Gold. Show Answer Correct Answer: D) Gold. 20. Cutting a slice of bread from a loaf A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 21. What happens in a chemical change? A) The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed. B) When objects or substances undergo a change that does not change into a different substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed. 22. During digestion, which of the following is an example of a physical change? A) Enzymes breaking down proteins into amino acids. B) Teeth grinding food into smaller pieces. C) Stomach acid breaking down food. D) Bacteria fermenting fiber in the colon. Show Answer Correct Answer: B) Teeth grinding food into smaller pieces. 23. What characteristic defines all chemical changes? A) There is a change of state. B) Electricity is produced. C) A new material is formed. D) Bubbles are produced. Show Answer Correct Answer: C) A new material is formed. 24. How many different elements are in C$_{6}$H$_{12}$O$_{22}$ A) Three. B) 22. C) 12. D) 6. Show Answer Correct Answer: A) Three. 25. Tearing a piece of paper into pieces A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. ← PreviousNext →Related QuizzesClass 7 Science Chapter 5 Physical And Chemical Changes Quiz 1Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 2Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 3Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 4Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 5Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 6Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 7Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 8Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books