This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Heat transfers from ..... objects to cold objects. A) Cold. B) Hot. C) Convection. D) Radiation. Show Answer Correct Answer: B) Hot. 2. A cold spoon is placed inside a cup of hot lemon tea. Which of the following is correct? A) Heat flows from the spoon to the tea. B) Heat flows from the tea to the spoon. C) Temperature flows from the spoon to the tea. D) Temperature flows from the tea to the spoon. Show Answer Correct Answer: B) Heat flows from the tea to the spoon. 3. In a vaccum flask the silvered walls reduce the heat transfer caused by- A) Radiation. B) Convection. C) Conduction. D) None of the above. Show Answer Correct Answer: A) Radiation. 4. Temperature is the measurement of the average ..... energy of the molecules in an object A) Kinetic. B) Heat. C) Motion. D) None of the above. Show Answer Correct Answer: A) Kinetic. 5. Which will not undergo sublimation? A) Ammonium chloride. B) Camphor. C) Sodium chloride. D) Iodine. Show Answer Correct Answer: C) Sodium chloride. 6. Paheli Wants To Know That Is It Possible To Construct Building Which Are Not Affected By Heat? A) Building made by soil. B) Wooden bricks are used in the building. C) Hollow bricks are used for making building. D) White colored cement bricks are used in building. Show Answer Correct Answer: C) Hollow bricks are used for making building. 7. HEAT IS A ..... QUANTITY A) SCALER. B) VECTOR. C) All the above. D) None of the above. Show Answer Correct Answer: A) SCALER. 8. The SI unit of Heat is A) Watt. B) Calories. C) Joules. D) None of the above. Show Answer Correct Answer: C) Joules. 9. All of the following are sources of heat EXCEPT ..... A) Sunlight. B) Friction. C) Fire. D) Electricity. Show Answer Correct Answer: C) Fire. 10. (c) All molecules of a liquid take part in the process of evaporation A) FALSE. B) TRUE. C) All the above. D) None of the above. Show Answer Correct Answer: A) FALSE. 11. A chair is placed several feet from a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 12. J of energy are added to a sample of iron and the temperature of the sample increases by 22.36$^{o}$C. What must be the mass of this iron sample? (C$_{Fe}$ =.4494 J/g * $^{o}$C) A) 65.34 g. B) 89.36 g. C) 48, thirst. D) 35.21g. Show Answer Correct Answer: A) 65.34 g. 13. Which would make the best roof material for a miniature solar oven used to cook meat? A) Cement. B) Glass. C) Paper. D) Wood. Show Answer Correct Answer: B) Glass. 14. You are in science class and want to see if the hot plates were used recently. You place your hand near the side of the hot plate. Without touching the hot plate, your hand feels warmer. Heat is transferred to your hand by ..... ? ..... A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 15. The amount of heat energy required to raise the temperature of one kilogram of water by one degree celsius from 14.5 to 15.5 degree celsius is A) Calorie. B) Newton meter. C) Kilocalorie. D) Pascal. Show Answer Correct Answer: C) Kilocalorie. 16. On a sunny day, what would most likely happen to the temperature of a lake's water? A) The temperature would not change from morning to afternoon. B) The temperature would go down from morning to afternoon. C) The temperature would go up from morning to afternoon. D) The temperature would go up and down all day long. Show Answer Correct Answer: C) The temperature would go up from morning to afternoon. 17. What is the definition of CONVECTION A) When heat transfers through waves. B) When heat transfers from objects that are touching. C) A hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks. D) Heat traveling from the sun. Show Answer Correct Answer: C) A hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks. 18. What type of heat transfer happens in liquids and gases? A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 19. What is the role of insulation in preventing heat loss? A) Insulation has no effect on preventing heat loss. B) Insulation reduces heat transfer by trapping air pockets. C) Insulation absorbs heat and releases it slowly. D) Insulation increases heat transfer by conducting heat efficiently. Show Answer Correct Answer: B) Insulation reduces heat transfer by trapping air pockets. 20. Physical effects of heat are not A) Change in temperature. B) Change of state. C) Solvent action of water. D) Thermal expansion. Show Answer Correct Answer: C) Solvent action of water. 21. Emily has a cup of hot cocoa on the counter to cool off so she can drink it safely. She watches the steam rise from the hot cocoa. Which type of thermal energy transfer is occurring as the steam rises into the surrounding air? A) Conduction. B) Convection. C) Radiation. D) Transformation. Show Answer Correct Answer: B) Convection. 22. What kind of heat transfer happens when the sun is heating your body? A) Conduction. B) Radiation. C) Convection. D) Density. Show Answer Correct Answer: B) Radiation. 23. While on a camping trip, Mackenzie and her family sat around the campfire. Even after the fire had been put out, Mackenzie could feel that the air above the rocks surrounding the campfire was warm. Which best explains how the heat was transferred? A) From the air to the fire to the rocks. B) From the rocks to the fire to the air. C) From the rocks to the air to the fire. D) From the fire to the rocks to the air. Show Answer Correct Answer: D) From the fire to the rocks to the air. 24. Latent heat of vaporization of water is ..... A) 340 cal/gm. B) 440 cal/gm. C) 540 cal/gm. D) 640 cal/gm. Show Answer Correct Answer: C) 540 cal/gm. 25. What type of heat transfer occurs when eggs cook in a hot pan? A) Convection. B) Radiation. C) Conduction. D) None of the above. Show Answer Correct Answer: C) Conduction. ← 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