This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If you mix two liquids, and they create bubbles and fizz, it's most likely a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 2. Two clear substances are combined inside a plastic bag. The plastic bag is tightly sealed. What observation would indicate that mixing the chemical produced a new substance? A) The substance in the bag becomes warm. B) The bag is transparent. C) The substances are clear. D) The bag can hold a liquid. Show Answer Correct Answer: A) The substance in the bag becomes warm. 3. Other examples of chemical changes include EXCEPT A) A banana changes from yellow to brown. B) Milk sours and turns from a liquid to a solid. C) Bubble form when baking soda is added to vinegar. D) Bubbles form in water as it heats up creating water vapor. Show Answer Correct Answer: D) Bubbles form in water as it heats up creating water vapor. 4. Pick the answers that states a chemical change. A) Tin metal is placed over a fire and heats up. B) Strip of paper is burned and a new substance is formed. C) Water is boiled and disappears. D) Solid wax melts. Show Answer Correct Answer: B) Strip of paper is burned and a new substance is formed. 5. Butter melting A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 6. Chemical or Physical change?Ice melting A) Chemical. B) Physical. C) Neither. D) Both. Show Answer Correct Answer: B) Physical. 7. This is a change in energy that is taken in. A) Endothermic. B) Thermal energy. C) Exothermic. D) Physical change. Show Answer Correct Answer: A) Endothermic. 8. The temperature at which liquid water boils or becomes a gas, 212 degrees Fahrenheit A) Boiling Point. B) Hot Point. C) Freezing Point. D) Ice Point. Show Answer Correct Answer: A) Boiling Point. 9. Chew A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 10. Boiling water is an example of a ..... A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 11. Sublimation occurs when a solid changes directly to a gas. A) Ture. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) Ture. 12. Two children in a wading pool notice that the water level is lower than it was the week before. What happened to the water? A) Some of the water evaporated. B) The pool absorbed some of the water. C) Condensation caused the water to disappear. D) Toys in the pool absorbed some of the water. Show Answer Correct Answer: A) Some of the water evaporated. 13. Whate is the example of chemical change? A) Melting an ice cube. B) Paper into ash. C) Crushing a can. D) Shredding paper. Show Answer Correct Answer: B) Paper into ash. 14. When heat is taken away from a container of water, what will happen? A) It will become a gas. B) It will become a solid. C) There will be less mass. D) None of the above. Show Answer Correct Answer: B) It will become a solid. 15. Iron and rust are the same substances. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. What is the Law of Conservation of mass? A) Mass is created in a chemical reaction. B) Mass is created in a physical change. C) New chemicals formed from a chemical reaction have a larger overall mass than the original reactants. D) Mass is never created or destroyed. Show Answer Correct Answer: D) Mass is never created or destroyed. 17. Rust is an example of a ..... A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 18. A substance with a definite volume by not definite shape is a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: B) Liquid. 19. What should be done first to conduct an experiment safely? A) Get any chemical that are needed from the supply cabinet and open the bottles. B) Begin heating any chemicals that will need to be hot. C) Begin mixing any chemicals that are needed for the experiment. D) Read every step of the procedure to make sure they understand it. E) Begin collecting any equipment you think you will need. Show Answer Correct Answer: D) Read every step of the procedure to make sure they understand it. 20. Drying of leaves 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 during a chemical change? A) The substance changes color. B) A new substance is formed. C) The substance changes shape. D) The substance becomes colder. Show Answer Correct Answer: B) A new substance is formed. 22. What happens when my glass of water is sitting in the sun and disappears into a gas? A) Evaporation. B) Burning. C) Melting. D) Freezing. Show Answer Correct Answer: A) Evaporation. 23. A cup of water left outside for two days had only half a cup of water left. What happened? A) Evaporation; chemical change. B) Condensation; physical change. C) Evaporation; physical change. D) Condensation; chemical change. Show Answer Correct Answer: C) Evaporation; physical change. 24. Burning of wood A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 25. Sugar dissolves in water A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) 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 9Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books