This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 42 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which answer makes a correct statement? A) Physical change only changes the size. B) Physical change only changes the color. C) Physical changes begin and end with the same matter. D) Physical changes change the matter into something total different. Show Answer Correct Answer: C) Physical changes begin and end with the same matter. 2. Evaporation is a physical change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. What percent of elements are metals? A) 20%. B) 10%. C) 75%. D) 100%. Show Answer Correct Answer: C) 75%. 4. Which type of property is the ability to conduct electricity? A) Physical property. B) Chemical property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical property. 5. What is the first source of energy for all food webs? A) Plants. B) Sunlight. C) Mineral in the soil. D) Decomposersers. Show Answer Correct Answer: B) Sunlight. 6. What is the best way to separate a mixture of sugar, sand, and water? A) Freeze the mixture, causing the water to be destroyed, then sift the sugar from the sand. B) Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate. C) Filter the mixture, causing the sugar and sand to get caught but not the water. D) Stir the mixture, causing the water to move above the sugar and sand. Show Answer Correct Answer: B) Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate. 7. Chemical or Physical change?Fireworks exploding A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 8. Cutting Paper A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 9. In a ..... change, a substance changes into a different substance. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 10. When two substances are mixed together but their properties do not change they are called a A) Mixture. B) Solution. C) Chemical change. D) None of the above. Show Answer Correct Answer: A) Mixture. 11. What is the definition of physical changes? A) Changes that describe how a substance behaves under different conditions. B) Characteristics that describe how a substance interacts with other substances. C) Changes that alter the form or appearance of a substance, but not its chemical composition. D) Changes that lead to the formation of new substances with different chemical properties. Show Answer Correct Answer: C) Changes that alter the form or appearance of a substance, but not its chemical composition. 12. Soil erosion is a desirable change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. What is the process of a solid changing directly into a gas called? A) Sublimation. B) Evaporation. C) Melting. D) Condensation. Show Answer Correct Answer: A) Sublimation. 14. The Law of Conservation of Mass states A) That matter exists in all states and reacts the same. B) That matter can only be changed into new substances by introducing a catalyst. C) That matter exists in the same state throughout any chemical change. D) That matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants. Show Answer Correct Answer: D) That matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants. 15. Chemical or Physical Change?Baking a cake A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 16. When heat is removed from the water the molecules A) Nothing happens. B) Slow down and spread apart. C) Speed up and are close together. D) Slow down and come closer together. Show Answer Correct Answer: D) Slow down and come closer together. 17. Which of the following chemical formulas represents a compound? A) C$_{3}$. B) O$_{2}$. C) CH $ _ {3} $ for. D) H$_{2}$. Show Answer Correct Answer: C) CH $ _ {3} $ for. 18. Which of these is a clue that a chemical change is happening? A) Fizzing or bubbling. B) Color changes. C) Creation/loss of heat. D) All of these are clues that a chemical change is happening. Show Answer Correct Answer: D) All of these are clues that a chemical change is happening. 19. Which word demonstrates a chemical change? A) Burning. B) Evaporating. C) Melting. D) None of the above. Show Answer Correct Answer: A) Burning. 20. Every chemical change results in- A) A change in temperature. B) The formation of a new substance. C) A color change. D) The formation of a precipitate. Show Answer Correct Answer: B) The formation of a new substance. 21. Glass shatters on the ground. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 22. Hydrochloric acid in the stomach breaking down food is ..... A) Physical/mechanical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 23. Which of the examples is a physical change that takes place in our mouth in the digestion process. A) Saliva helps break down food into simple sugars. B) Grinding food breaks down food into smaller pieces. C) All the above. D) None of the above. Show Answer Correct Answer: B) Grinding food breaks down food into smaller pieces. 24. A ..... the appearance or form of the matter changes but the kind of matter in the substance does not A) Amino acid. B) Chemical change. C) Physical change. D) Combustion. Show Answer Correct Answer: C) Physical change. 25. The temperature of ice is below 0'C (celsius) and it is a SOLID. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← 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