This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a substance that does NOT conduct heat well? A) Conductor. B) Insulator. C) Convector. D) Radiator. Show Answer Correct Answer: B) Insulator. 2. How does the heat of the Sun reaches the Earth? A) Thermal expansion. B) Conduction. C) Convection. D) Radiatiion. Show Answer Correct Answer: D) Radiatiion. 3. Where can heat come from? A) Rubbing your hands together. B) Drinking water. C) None of the above. D) All of the above. Show Answer Correct Answer: A) Rubbing your hands together. 4. All of the following are examples of convection currents, except: A) Warm air rising in a house. B) Cold water sinking to the bottom of a lake. C) Water flowing through pipes. D) Steam from hot soup rising into the air. Show Answer Correct Answer: C) Water flowing through pipes. 5. Small gaps are left between railway lines because ..... A) Rails of very long dimensions will shatter. B) Expansion of rails occurs during summer. C) Contraction of rails occurs during winter. D) Both (b) and (c). Show Answer Correct Answer: D) Both (b) and (c). 6. Energy that does need a medium (usually air or water) to transfer heat is called ..... A) Radiation. B) Conduction. C) Convection. D) Reflection. Show Answer Correct Answer: C) Convection. 7. Heat flows from a warmer place to a cooler one. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. If two glasses of water are at the same temperature, the average ..... energy of the particles are the same. A) Electromagnetic. B) Kinetic. C) Thermal. D) Heat. Show Answer Correct Answer: B) Kinetic. 9. Anything with molecules has heat. The colder the matter is the ..... the molecules move. A) Faster. B) Slower. C) All the above. D) None of the above. Show Answer Correct Answer: B) Slower. 10. The three types of heat transfer are ..... A) Spilling hot soup in your lap. B) Hot, hotter, and hottest. C) Conduction, convection and radiation. D) Conduction, convection and tickling. Show Answer Correct Answer: C) Conduction, convection and radiation. 11. A metal spoon placed in a bowl of hot soup is heated by ..... A) Radiation. B) Conduction. C) Friction. D) Convection. Show Answer Correct Answer: B) Conduction. 12. Trapped air is a good conductor because it reduces heat transfer. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Aluminum changes temperature at a slower pace than lead. Aluminum has a higher A) Temperature. B) Conduction rate. C) Thermal energy. D) Specific heat. Show Answer Correct Answer: D) Specific heat. 14. You are roasting marshmallows at a campfire. The metal skewer (stick) that you're cooking your marshmallow on burns your hand because of ..... ? ..... A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 15. THE TRANSFER OF HEAT GENERALLY REQUIRES MEDIUM BUT THERE IS ONE METHOD OF HEAT TRANSFER WHERE THERE IS NO NEED OF ANY MEDIUM.NAME THE METHOD A) CONDUCTION. B) RADIATION. C) CONVECTION. D) ALL OF THE ABOVE. Show Answer Correct Answer: B) RADIATION. 16. What is the SI unit of heat? A) Kelvin. B) Celsius. C) Fahrenheit. D) Joule. Show Answer Correct Answer: D) Joule. 17. When you touch a cold window, how is energy being transferred? A) The window transfers heat to you. B) You transfer heat to the window. C) The sun transfers heat to you. D) None of the above. Show Answer Correct Answer: B) You transfer heat to the window. 18. Using the heat equation, what would the formula look like if we were solving for specific heat? A) Q=mc$\Delta$T. B) Q=c/m$\Delta$T. C) C=qm$\Delta$T. D) C=q/m$\Delta$T. Show Answer Correct Answer: D) C=q/m$\Delta$T. 19. What color reflects light (meaning the object stays cooler)? A) White. B) Black. C) Orange. D) Pink. Show Answer Correct Answer: A) White. 20. How does heat travels in air- A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 21. Radiation= A) Physical contact. B) Warm air rising. C) Heat moving through empty space. D) Say what?. Show Answer Correct Answer: C) Heat moving through empty space. 22. Nights are cooler in the deserts because A) Sand radiates heat less quickly as compared to Earth. B) The sky is generally clear. C) Sand radiates heat more quickly as compared to Earth. D) The sky is generally cloudy. Show Answer Correct Answer: C) Sand radiates heat more quickly as compared to Earth. 23. What type of heat transfer is involved in cooking a s'more over a fire? A) Convection. B) Radiation. C) Conduction. D) None of the above. Show Answer Correct Answer: B) Radiation. 24. Which best explains why a refrigerator is usually not made completely out of metal? A) Metal will not transfer heat, which allows the refrigerator to remain cool. B) Metal easily transfers heat, which would warm the inside of the refrigerator. C) Metal would heat up quickly on the outside, making the door too hot to touch. D) Metal cools quickly, causing the refrigerator to be too cold and freeze the food inside. Show Answer Correct Answer: B) Metal easily transfers heat, which would warm the inside of the refrigerator. 25. The more particles a substance has at a given temperature, the more thermal energy it has. 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 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