This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Sarah is stirring her hot chocolate with a metal spoon, and she notices that the spoon is getting hot. This is most likely caused by which type of heat? A) Conduction. B) Convection. C) Radiation. D) Insulation. Show Answer Correct Answer: A) Conduction. 2. Two liquids combining to make the temperature rise is which type of heat source? A) Electricty. B) Friction. C) Sunlight. D) Mixing things together-chemical change. Show Answer Correct Answer: D) Mixing things together-chemical change. 3. A student is cooking some bacon in a pan. What transfer of heat is occurring? A) Friction. B) Insulation. C) Temperature. D) Conduction. Show Answer Correct Answer: D) Conduction. 4. The tool used to measure temperature is called a/an A) Insulator. B) Conductor. C) Thermometer. D) Radiation. Show Answer Correct Answer: C) Thermometer. 5. What is the unit of heat? A) Celcius degree. B) Joule. C) Pascal. D) Metre. Show Answer Correct Answer: B) Joule. 6. The heat from the oven reflects on the metal pan heating it up, the brownies touching the heated metal pan bakes the brownies through ..... A) Radiation. B) Convection. C) Conduction. D) None of the above. Show Answer Correct Answer: C) Conduction. 7. Latent heat is A) The heat absorbed or released at a boiling process during a change of phase. B) The heat absorbed or released at a constant temperature during a change of phase. C) The heat absorbed or released at a constant temperature during a change of phase of 1 kg object. D) The heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius. Show Answer Correct Answer: B) The heat absorbed or released at a constant temperature during a change of phase. 8. Dark coloured clothes absorb more heat. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 9. The sun warms your skin on a cold day. A) Conduction. B) Convection. C) Radiation. D) Temperature. Show Answer Correct Answer: C) Radiation. 10. Cooking a pancake on a griddle A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 11. An ideal gas as compared to a real gas at very high pressure occupies ..... A) More volume. B) Less volume. C) Same volume. D) None of the above. Show Answer Correct Answer: A) More volume. 12. A bimetallic strip made from brass and invar bends when heated. When it's bent, the object has ..... A) Brass on the outside and invar on the inside. B) Invar on the outside and brass on the inside. C) Brass and invar of the same length. D) Brass on the outside for a while and then invar will take its place. Show Answer Correct Answer: A) Brass on the outside and invar on the inside. 13. The change in state from liquid to gas is called A) Vaporization. B) Sublimation. C) Condensation. D) Deposition. Show Answer Correct Answer: A) Vaporization. 14. What happens when something loses heat? A) It becomes hotter. B) It becomes colder. C) All the above. D) None of the above. Show Answer Correct Answer: B) It becomes colder. 15. Seema is in a hurry and wants her noodles to cool down faster. She should put it on a plate made of A) Wood. B) Paper. C) Plastic. D) Metal. Show Answer Correct Answer: D) Metal. 16. Energy from the Sun reaches Earth by A) Radiation. B) Conduction. C) Convection. D) Thermal expansion. Show Answer Correct Answer: A) Radiation. 17. ..... objects in a fire can produce heat. A) Burning. B) Freezing. C) Moving. D) Rubbing. Show Answer Correct Answer: A) Burning. 18. What unit do you use to measure Thermal Energy (q)? A) J/g $^\circ$C. B) G. C) $^\circ$C. D) J. Show Answer Correct Answer: D) J. 19. Heat transfer through liquid and gases A) Conduction. B) Convection. C) Radiation. D) Temperature. Show Answer Correct Answer: B) Convection. 20. ..... is measured by the unit Joules. A) Heat energy. B) Temperature. C) Specific heat. D) None of the above. Show Answer Correct Answer: A) Heat energy. 21. How much energy is required to raise 85.36 g of water from 18.5$^{o}$C to 60.3$^{o}$C? A) 21500 J. B) 6610 J. C) 14900 J. D) 85400 J. Show Answer Correct Answer: C) 14900 J. 22. Heat is transferred by the movement of currents within a fluid by a process called ..... A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 23. Heat reaches to the surface of the earth through A) Radiation. B) Convection. C) Conduction. D) All. Show Answer Correct Answer: A) Radiation. 24. The energy transfer between the hot fluid and cold fluids is brought about by their complete physical mixing in A) Direct contact heat exchanger. B) Recuperators. C) Regenerators. D) Boilers. Show Answer Correct Answer: A) Direct contact heat exchanger. 25. The average kinetic energy of the molecules in the substance is directly proportional to A) Absolute temperature. B) Room temperature. C) Mass of substance. D) Internal energy. Show Answer Correct Answer: A) Absolute temperature. ← 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