This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An ice cube melts in a glass of water. Has a chemical reaction taken place? How do you know? A) Yes, a new substance was formed. B) Yes, a gas was given off. C) No, the color did not change. D) No, a phase change does always not indicate a chemical. Show Answer Correct Answer: D) No, a phase change does always not indicate a chemical. 2. When a substance reacts with something else and forms a new substance, this is an example of: A) A physical property. B) A chemical property. C) A physical change. D) Both a and b. Show Answer Correct Answer: B) A chemical property. 3. Which type of change can be undone? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 4. The principle of conservation of mass is true A) Only for reactions that take place in open systems. B) Only for reactions that take place in closed systems. C) For reactions in both open and closed systems. D) For no reactions at all. Show Answer Correct Answer: C) For reactions in both open and closed systems. 5. Kinetic energy is knows as? A) Energy in motion. B) Light energy. C) Sound energy. D) Chemical energy. Show Answer Correct Answer: A) Energy in motion. 6. Any substance that has a mass and takes up space is called A) A box. B) Matter. C) An idea. D) Mass. Show Answer Correct Answer: B) Matter. 7. A combination of two or more substances where each keeps its own properties and can be easily separated A) Change. B) Manipulation. C) Mixture. D) Substances. Show Answer Correct Answer: C) Mixture. 8. Tearing paper A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 9. Elements are the basic building blocks of matter. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. In the context of digestion, what is the primary function of bile? A) To chemically digest proteins. B) To physically break down carbohydrates. C) To emulsify fats for easier digestion. D) To neutralize stomach acid. Show Answer Correct Answer: C) To emulsify fats for easier digestion. 11. A change in some properties of matter that does not form a different kind of matter is a what? A) Chemical change. B) Physical change. C) Chemical reaction. D) Temperature change. Show Answer Correct Answer: B) Physical change. 12. Mrs. Schimmel left a glass of ice on the counter. After 3 hours, Mrs. Schimmel noticed that the ice has melted and is now water. The particles that were in the ice have now (a) A) A. spread apart and are moving faster. B) Spread apart and are moving slower. C) Got closer together and are moving faster. D) None of the above. Show Answer Correct Answer: A) A. spread apart and are moving faster. 13. Which of the following processes best describes a physical change that occurs during digestion A) Stomach acid breaks down proteins. B) Bile breaks down fat. C) Saliva breaking down large molecules into smaller molecules. D) Chewing food to break down large pieces so they can be swallowed. E) Pancreatic enzymes breaking carbohydrates into sugars. Show Answer Correct Answer: D) Chewing food to break down large pieces so they can be swallowed. 14. Which answer below makes a correct statement? A) Physical change only changes the color. B) Physical change only changes the size. C) Physical change changes the matter into something totally different. D) Physical change begins and ends with the same matter. Show Answer Correct Answer: D) Physical change begins and ends with the same matter. 15. Scenario:Mixing baking soda and vinegar causes a foaming reaction. Does a chemical or physical change occur? A) Change in state occurs. B) No change occurs. C) Physical change. D) Chemical change. Show Answer Correct Answer: D) Chemical change. 16. When two liquids are mixed and a solid forms as a result of a reaction, the solid is called a A) Participant. B) Perceive. C) Polypeptide. D) Precipitate. Show Answer Correct Answer: D) Precipitate. 17. Which of the following best describes a chemical change in the digestive system? A) Food is mixed with saliva. B) Proteins are broken down into amino acids. C) Food is swallowed. D) Nutrients are absorbed into the bloodstream. Show Answer Correct Answer: B) Proteins are broken down into amino acids. 18. A process in which one or more substances, the reactants, are converted to one or more different substances, the products A) Chemical properties. B) Chemical reaction. C) Chemical change. D) Chemical. Show Answer Correct Answer: B) Chemical reaction. 19. A chemical change cannot be easily undone. True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. Solubility (dissolves) A) Physical Proeprty. B) Chemical Property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Proeprty. 21. What type of change takes place when you separate a mixture A) Chemical change. B) Physical change. C) Mixture. D) Solution. Show Answer Correct Answer: B) Physical change. 22. When a physical change occurs, you begin and end with A) Different substances. B) The same substance. C) A colorful substance. D) No substance. Show Answer Correct Answer: B) The same substance. 23. Magnesium burns with a bright ..... flame. A) White. B) Red. C) Blue. D) Green. Show Answer Correct Answer: A) White. 24. In a physical change physical properties of the substance is changed A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Megan lights a candle and watches it burn. She observes that some wax melts, some smoke comes from the wick, the wick burns, and then the melted wax hardens again.Which represent chemical changes? A) The wick burns, and smoke comes from the wick. B) Some wax melts, and smoke comes from the wick. C) Some wax melts, and later melted wax hardens again. D) Smoke comes from the wick, and later melted wax hardens again. Show Answer Correct Answer: A) The wick burns, and smoke comes from the wick. ← 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 9Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books