This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a sea breeze, the air is warmer above the ..... A) Land. B) Ocean. C) Sky. D) Beach. Show Answer Correct Answer: A) Land. 2. The normal temperature of human body is 37$^\circ$C. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. A material that conducts heat poorly is called a A) Insulator. B) Conductor. C) Metal. D) Radiator. Show Answer Correct Answer: A) Insulator. 4. Which characteristic of wax makes it a good choice for making candles? A) It is moist. B) It burns yellow. C) It melts easily. D) It is lightweight. Show Answer Correct Answer: C) It melts easily. 5. S.I. unit of temperature. A) Joule. B) Fahrenheit. C) Celsius. D) Kelvin. Show Answer Correct Answer: D) Kelvin. 6. Rate of evaporation increases as? A) Exposed surface area of liquid increases. B) Exposed surface area of liquid decreases. C) Movement of air above surface of liquid decreases. D) Atmospheric pressure increases. Show Answer Correct Answer: A) Exposed surface area of liquid increases. 7. Temperature is measured by a device called ..... A) Stick. B) Thermometer. C) Clinical thermometer. D) Laboratory thermometer. Show Answer Correct Answer: B) Thermometer. 8. What is the definition of CONDUCTION? A) When heat is transferred from objects like rays of light or electromagnetically. B) A hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks. C) When heat transfers from objects that are touching. D) When heat transfers through the heater or AC in your house. Show Answer Correct Answer: C) When heat transfers from objects that are touching. 9. As the thermal energy of mater increases, its particles usually spread out, causing: A) Condensation. B) Evaporation. C) Thermal expansion. D) Vaporization. Show Answer Correct Answer: C) Thermal expansion. 10. Which of the following shows heat loss? A) Boiling water. B) Eggs cooking on a pan. C) Ice cream melting under the sun. D) Hot bowl of soup becoming room temperature. Show Answer Correct Answer: D) Hot bowl of soup becoming room temperature. 11. How does heat flow? A) Always from cold to warm. B) Always from warm to cold. C) Both warm to cold & cold to warm. D) It depends on the temperature. Show Answer Correct Answer: B) Always from warm to cold. 12. When you heat materials for 10 minutes, how would you know which one is the BEST conductor? A) The material which temperature increases the most. B) The material that changes the slowest. C) The material which temperature increases the least. D) The material that stays the same. Show Answer Correct Answer: A) The material which temperature increases the most. 13. In a swimming pool, water near the surface is slightly warmer. The warm water rises because of A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 14. Which of these is a good conductor A) Wood. B) Paper. C) Silver. D) Air. Show Answer Correct Answer: C) Silver. 15. HEAT IS TRANSFERRED BY CONDUCTION IN A) SOLIDS. B) LIQUIDS. C) GASES. D) ALL OF THEM. Show Answer Correct Answer: A) SOLIDS. 16. Materials that transfer energy easily. A) Conductors. B) Insulators. C) Heat. D) Energy. Show Answer Correct Answer: A) Conductors. 17. Which of these would make the BEST insulator? A) A piece of paper. B) A metal pan. C) A fur coat. D) A steel fork. Show Answer Correct Answer: C) A fur coat. 18. When two objects are in physical contact with each other A) Conduction. B) Convection. C) Radiation. D) Friction. Show Answer Correct Answer: A) Conduction. 19. All objects radiate heat. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 20. Which the following is a warming process A) Evaporation. B) Condensation. C) Boiling. D) All of the above. Show Answer Correct Answer: B) Condensation. 21. In convection the heat transfer occurs by movement of the fluid itself. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. In coastal regions, when warm air from either land or sea rises, the cold air that replaces it creates a breeze. Which of the following is a correct description of such a breeze? A) Land breeze is received by land during the daytime. B) Sea breeze is received by sea from the land, at night. C) Land gets heated quicker in the day and causes a sea breeze. D) Sea gets heated quicker during the day and causes a sea breeze. Show Answer Correct Answer: C) Land gets heated quicker in the day and causes a sea breeze. 23. Something will melt faster in the ..... A) Shade. B) Freezer. C) Sun. D) None of the above. Show Answer Correct Answer: C) Sun. 24. When heat is added to ice, the first change it goes through will be which of the following? A) It will begin to boil. B) It will melt into water. C) It will turn into steam. D) It will become a gas. Show Answer Correct Answer: B) It will melt into water. 25. Give an example of conduction. A) Wooden stick placed in a cold glass of water. B) Metal spoon placed in a hot cup of coffee. C) Plastic straw in a lukewarm drink. D) Rubber band stretched over a pencil. Show Answer Correct Answer: B) Metal spoon placed in a hot cup of coffee. ← PreviousNext →Related QuizzesClass 7 Science Chapter 3 Heat Quiz 1Class 7 Science Chapter 3 Heat Quiz 2Class 7 Science Chapter 3 Heat Quiz 3Class 7 Science Chapter 3 Heat Quiz 4Class 7 Science Chapter 3 Heat Quiz 5Class 7 Science Chapter 3 Heat Quiz 6Class 7 Science Chapter 3 Heat Quiz 7Class 7 Science Chapter 3 Heat Quiz 8Class 7 Science Chapter 3 Heat Quiz 9Class 7 Science Chapter 3 Heat Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books