This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A circular flow of warmer fluid and cooler fluid is called a ..... A) Conduction Current. B) Convection Current. C) Radiation Current. D) None of the above. Show Answer Correct Answer: B) Convection Current. 2. When water is heated on a stove, which process primarily causes the water at the bottom to rise to the top? A) Conduction. B) Convection. C) Radiation. D) Evaporation. Show Answer Correct Answer: B) Convection. 3. One joule is A) 0.238 calorie. B) 0.5 calorie. C) 2 calories. D) 4.186 calorie. Show Answer Correct Answer: A) 0.238 calorie. 4. Heat energy makes things ..... A) Warmer. B) Cooler. C) Do nothing. D) None of the above. Show Answer Correct Answer: A) Warmer. 5. What is the SI unit of temparature A) Kelvin. B) Celsius. C) Farhenheit. D) None of these. Show Answer Correct Answer: A) Kelvin. 6. How many degrees is the equator towards the north or south? A) 0 degrees. B) 23.5 degrees. C) 66.5 degrees. D) None of the above. Show Answer Correct Answer: A) 0 degrees. 7. What is formula of Force? A) Net force * Mass. B) Mass / Acceleration. C) Sandwich. D) Mass / Velocity. Show Answer Correct Answer: B) Mass / Acceleration. 8. Which question would help a student find out if friction is a source of heat energy? A) Why does snow disappear in the spring?. B) Do objects feel warmer after rubbing them together?. C) How long does it take water to boil on the stove?. D) What causes the ice cubes to melt in a glass of ice water?. Show Answer Correct Answer: B) Do objects feel warmer after rubbing them together?. 9. In how many categories heat exchangers are classified on the basis of direction of flow of fluids? A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: B) 3. 10. Which of these is an insulator of heat A) Iron. B) Copper. C) Air. D) Steel. Show Answer Correct Answer: C) Air. 11. An example of radiated heat is: A) Heating a hot dog on a frying pan. B) The sun's rays reaching our skin. C) Burning your hand on a hot stove. D) . cooking a hot dog in boiling water. Show Answer Correct Answer: B) The sun's rays reaching our skin. 12. If a black jar of water and a white jar of water were placed in sunlight all day ..... A) The temperature in the white jar would increase the fastest. B) Both jars would increase the same amount. C) The temperature in the black jar would increase the fastest. D) Both jars would get so hot they would explode. Show Answer Correct Answer: C) The temperature in the black jar would increase the fastest. 13. The term ABSOLUTE ZERO refers to what temperature? A) 0$^{ o}$C. B) 0$^{ o}$F. C) 0 K. D) None of the above. Show Answer Correct Answer: C) 0 K. 14. How does removing heat change the particles in a closed system? A) Particles move apart. B) Particles slow down and break apart. C) Particles move faster and potentially change phases. D) Particles move slower and potentially change phases. Show Answer Correct Answer: D) Particles move slower and potentially change phases. 15. To save on heating bills, a roof of a building should be lined with which of the following? A) A thermal conductor. B) A thermal insulator. C) Nothing. D) None of the above. Show Answer Correct Answer: B) A thermal insulator. 16. When a piece of aluminum foil is taken out of the oven and cools from 100$^\circ$ to 50$^\circ$, What is the change in temperature? A) 50$^\circ$. B) 0$^\circ$. C) 100$^\circ$. D) 150$^\circ$. Show Answer Correct Answer: A) 50$^\circ$. 17. What is the unit of Temperature? A) Joule. B) Heat. C) Metre. D) Kelvin. Show Answer Correct Answer: D) Kelvin. 18. Heat always A) From hotter object to colder object. B) From colder object to hotter object. C) In both the directions. D) Heat never flows from one object to the other. Show Answer Correct Answer: A) From hotter object to colder object. 19. Things that give off light often give off heat as well. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. The addition of 485 J of energy increases the temperature of a 47.3 g sample of a metal from 25.6$^{o}$C to 45.3$^{o}$C. What is the specific heat capacity of this metal? A) .226 J/g*$^{o}$C. B) .520 J/g*$^{o}$C. C) .401 J/g*$^{o}$C. D) .385 J/g*$^{o}$C. Show Answer Correct Answer: B) .520 J/g*$^{o}$C. 21. Ray holds an ice cube in his hand. After some time passes, the ice cube begins to melt. Which word describes the process of heat transfer? A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 22. A sunburn is caused by A) Convection. B) Conduction. C) Radiation. D) None of these. Show Answer Correct Answer: C) Radiation. 23. What unit do you use to measure Thermal Energy? A) J/kg $^\circ$C. B) Kg. C) $^\circ$C. D) J. Show Answer Correct Answer: D) J. 24. It is the transfer of heat from one place to another by the movement of molecules. A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 25. The maximum and minimum temperature of a day is measured with a A) Celsius thermometer. B) Fahrenheit thermometer. C) Kelvin thermometer. D) Maximum and minimum thermometer. Show Answer Correct Answer: D) Maximum and minimum thermometer. ← 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