This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 40 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 40 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Answering which question would help a student find out that the Sun is a source of heat energy? A) Why do some foods take longer to cook in the oven?. B) Why does a television feel warm after being turned on?. C) Why does a pot of water boil when heated on the stove?. D) Why do a pile of snowballs disappear in the spring?. Show Answer Correct Answer: D) Why do a pile of snowballs disappear in the spring?. 2. Choose the correct type of heat transfer:A hot air balloon rising A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Convection. 3. Debbie's mother has different types of pots in her kitchen. Many of them are made of copper and aluminum. Some are made of glass. Which of the following is the best reason why the pots are made of these materials? A) They are able to stop the flow of heat. B) They are good insulators of heat. C) They keep the same amount of heat. D) They are good conductors of heat. Show Answer Correct Answer: D) They are good conductors of heat. 4. You are holding a metal wire on one end, while the other end is placed over the flame. Very soon, the wire is too hot to handle. What method of heat transfer is taking place? A) Convection. B) Conduction. C) Radiation. D) Sublimation. Show Answer Correct Answer: B) Conduction. 5. Which of the following best describes a vacuum? A) Hot. B) Cold. C) Shiny. D) Empty. Show Answer Correct Answer: D) Empty. 6. Boiling water is an example of what two types of heat transfer A) Conduction and Radiation. B) Conduction and Convection. C) Radiation and Convection. D) None of the above. Show Answer Correct Answer: B) Conduction and Convection. 7. Which example shows that heat can change an object? A) Riding a bike down a hill. B) Watching a video in slow motion. C) Baking an apple. D) Drawing a picture of the sun. Show Answer Correct Answer: C) Baking an apple. 8. What is the process of heat transfer in liquids called? A) Evaporation. B) Radiation. C) Conduction. D) Convection. Show Answer Correct Answer: D) Convection. 9. ..... behaves like heat stores house for the earth A) Oceans. B) Hills. C) Plateaus. D) All the above. Show Answer Correct Answer: A) Oceans. 10. The unit(s) for heat are? A) Calories. B) Joules. C) Calories or joules. D) None of the above. Show Answer Correct Answer: C) Calories or joules. 11. Assuming that the thermal energy supplied to each of them is same, which of following states of matter would expand the least? (a) A) A. Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) A. Solid. 12. When an electric heater is supplied with an electric power of 2.0 kW to heat 4.0 kg of water for 1 minute, calculate the increase in temperature of the water. Assume that the specific heat capacity of water is 4200 J kg$^{-1}$ $^{0}$C$^{-1}$ and there is no heat loss to the surroundings. A) 3.05$^{0}$C. B) 7.1$^{0}$C. C) 14$^{0}$C. D) 30$^{0}$C. Show Answer Correct Answer: B) 7.1$^{0}$C. 13. Energy from the sun reach Earth mostly by A) Conduction. B) Radiation. C) Convection. D) Thermal expansion. Show Answer Correct Answer: B) Radiation. 14. Heat energy always moves in which direction? A) Large objects to small objects. B) Dark objects to light objects. C) Warm objects to cool objects. D) Smooth objects to rough objects. Show Answer Correct Answer: C) Warm objects to cool objects. 15. Rubbing your hands together is a way of producing heat. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. Which is an example of radiated heat for cooking? A) Cooking a pot of soup. B) Scrambling eggs on the stove. C) Grilling hot dogs over a campfire. D) Frying hamburgers in a frying pan. Show Answer Correct Answer: C) Grilling hot dogs over a campfire. 17. Heat is transferred through copper and iron by ..... A) Convection. B) Radiation. C) Conduction. D) All the above. Show Answer Correct Answer: C) Conduction. 18. Transfer of thermal energy through "space" A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 19. Roller coasters have gaps in the tracks so they can expand in hot weather due to A) Thermal expansion. B) Specific heat. C) Mood swings. D) Thermal conductivity. Show Answer Correct Answer: A) Thermal expansion. 20. Water has a specific heat of 4184 J/Kg$^\circ$C. Wood has a specific heat of 1760 J/Kg$^\circ$C. What material needs more energy to raise the temperature 1$^\circ$C A) Wood. B) Water. C) Both are the same. D) None of the above. Show Answer Correct Answer: B) Water. 21. This is a measure of the average kinetic energy of the particles of an object. A) Temperature. B) Kinetic energy. C) Heat. D) Thermal energy. Show Answer Correct Answer: A) Temperature. 22. Heat is radiated back to space from earth as A) Visible light. B) Ultraviolet radiation. C) Gamma radiation. D) Infrared radiation. Show Answer Correct Answer: D) Infrared radiation. 23. The hotness of an object is determine by its A) Climate. B) Temperature. C) All the above. D) None of the above. Show Answer Correct Answer: B) Temperature. 24. Ossi knows that convection is the transfer of heat energy. Which transfer of heat energy is made through convection? A) A gas burner heats water. B) The sun warms a person. C) A hand warms an ice cube. D) None of the above. Show Answer Correct Answer: A) A gas burner heats water. 25. If an ice cube is placed into a hot glass of hot chocolate, which statement is true? A) The hot chocoloate will freeze. B) The temperature of the hot cholcolate will increase. C) The temperature of the hot chocolate would stay the same. D) The temperature of the hot chocolate will decrease. Show Answer Correct Answer: D) The temperature of the hot chocolate will decrease. ← 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