This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The chemical properties of paper are changed when which of the following is done to it? A) Burning. B) Folding. C) Tearing. D) Cutting. Show Answer Correct Answer: A) Burning. 2. A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted? A) 500 grams, because the cheese does not gain or lose mass just because it was melted. B) 499 grams, because some of the cheese evaporates as it melts. C) 502 grams, because the cheese absorbs heat as it melts. D) None of the above. Show Answer Correct Answer: A) 500 grams, because the cheese does not gain or lose mass just because it was melted. 3. When placed in H$_{2}$0, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 4. An example of a liquid changing to a gas is A) Wood burning. B) Paper tearing. C) A pot of boiling water. D) A lake freezing in the winter. Show Answer Correct Answer: C) A pot of boiling water. 5. Which of the following is NOT an example of chemical change? A) Sour milk. B) Burning wood. C) Breaking a pencil. D) Rust. Show Answer Correct Answer: C) Breaking a pencil. 6. A chemical reaction in which substances combine rapidly with oxygen to produce light and heat A) Amino acid. B) Activation energy. C) Reactant. D) Combustion. Show Answer Correct Answer: D) Combustion. 7. While making a spade, an iron blade is fitted to the wooden handle: A) By heating then cooling. B) By cooling then heating. C) By melting then cooling. D) By freezing. Show Answer Correct Answer: A) By heating then cooling. 8. If enough heat is taken away from a container of water, what will happen to the water? A) It will begin to boil. B) It will become a solid. C) It will turn into a gas. D) It will increase in weight. Show Answer Correct Answer: B) It will become a solid. 9. A change in matter that produces new kinds of matter with different properties is a A) Physical change. B) Product. C) Solution. D) Chemical change. Show Answer Correct Answer: D) Chemical change. 10. Which of the following is an example of a chemical change? A) Melting chocolate. B) Crushing a soda can. C) Cutting paper. D) Wood burning. Show Answer Correct Answer: D) Wood burning. 11. Baking a cake for your friends birthday is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: D) Chemical Change. 12. If you break a piece of glass, the shape of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred? A) A chemical change. B) A temperature change. C) A phase change. D) A physical change. Show Answer Correct Answer: D) A physical change. 13. Ice cream melting A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical change. 14. During digestion the body uses both physical and chemical changes to move and process food. Which of the following is an example of a physical change? A) Teeth breaking food down into smaller pieces. B) Protein breaking down into amino acids in the stomach. C) Enzymes breaking down carbohydrates into simple sugars. D) Hydrochloric acid breaking down fats in the stomach. Show Answer Correct Answer: A) Teeth breaking food down into smaller pieces. 15. Which of these is a chemical property? A) Ability to be broken. B) Ability to react with acid. C) Ability to melt when heated. D) Ability to be cut. Show Answer Correct Answer: B) Ability to react with acid. 16. When you swallow your food and the food is then getting digestive in stomach acid and different enzymes, that is considered ..... A) Physical change. B) Chemical change. C) Mechanical digestion. D) Chemical digestion. Show Answer Correct Answer: D) Chemical digestion. 17. What is the example of a chemical change A) Burning of paper. B) Breaking of glass. C) Cutting of clothes. D) None of the above. Show Answer Correct Answer: A) Burning of paper. 18. If Mrs. Larmour put our crystals in a warm and dry environment, what would most likely happen to the water in the cups? A) The liquid water would freeze. B) The amount of water would not change. C) The water would evaporate until it is all gone. D) None of the above. Show Answer Correct Answer: C) The water would evaporate until it is all gone. 19. What is the definition of physical change? A) Any change that results in the formation of new chemical substances. B) Changes that result in the shape/form of a substance,. C) All the above. D) None of the above. Show Answer Correct Answer: B) Changes that result in the shape/form of a substance,. 20. Which one is the definition of chemical property? A) A property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed. B) Any change that results in the formation of new chemical substances. C) Combust content. D) None of the above. Show Answer Correct Answer: A) A property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed. 21. Brittleness:Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Property. 22. A change that alters the physical properties(appearance) of a substance without changing what the substance is MADE of (composition)! A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 23. True or false:The only chemical changes that generates light are ones that explode or generate flames. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. In a chemical change, the identity of a substance A) Changes. B) Stays the same. C) All the above. D) None of the above. Show Answer Correct Answer: A) Changes. 25. Why does a block of wood float, but a small nail sink in water? A) The nail is more dense than the wood. B) The wood is more dense than the nail. C) They are equal in density but made of different materials. D) None of the above. Show Answer Correct Answer: A) The nail is more dense than the wood. ← 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 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 9Class 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