This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The chart below lists the specific heat capacity of four different metals of equal mass. If the temperature of each metal were increased from 30$^\circ$C to 40$^\circ$C, which metal would require the highest amount of heat to raise its temperature? A) Zinc. B) Iron. C) Aluminum. D) Tin. Show Answer Correct Answer: C) Aluminum. 2. The work done in an adiabatic change in a perticular gas depends upon only A) Change in volume. B) Change in pressure. C) Change in temperature. D) None of above. Show Answer Correct Answer: C) Change in temperature. 3. Which of the following is neededfor convection to happen? A) Fluid/Gas. B) Light in form of rays. C) Fire. D) Eletromegnetic waves. Show Answer Correct Answer: A) Fluid/Gas. 4. What is meant by enthalpy change? A) Change in light energy. B) Change in kinetic energy. C) Change in potential energy. D) Change in heat energy. Show Answer Correct Answer: D) Change in heat energy. 5. Which shows an example of convection? A) Jose cooks an egg in a pot of boiling water. B) Clara burns her hand by touching a light bulb. C) Lucy wraps herself in an electric blanket to keep warm. D) Ben holds the end of a metal rod in fire to cook hot dogs. Show Answer Correct Answer: A) Jose cooks an egg in a pot of boiling water. 6. When a SOLID changes to a LIQUID, it A) Freezes. B) Boils. C) Melts. D) None of the above. Show Answer Correct Answer: C) Melts. 7. What is the correct SI unit for energy? (provide the correct name and symbol) A) Calorie, C. B) Temperature, C. C) Joule, j. D) Kelvin, K. Show Answer Correct Answer: C) Joule, j. 8. Food that is cooking on the stove is an example of what kind of energy? A) Heat. B) Nuclear. C) Light. D) None of these. Show Answer Correct Answer: A) Heat. 9. In an experiment, a student places a thermometer in a cup of hot water and observes the temperature rise. What type of heat transfer is primarily responsible for this observation? A) Conduction. B) Convection. C) Radiation. D) Evaporation. Show Answer Correct Answer: A) Conduction. 10. Radiation is the movement of heat in electromagnetic waves A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. Thermoses work because they minimize which kinds of heat transfer? A) Conduction and convection. B) Conduction and radiation. C) Convection and radiation. D) Conduction, convection and radiation. Show Answer Correct Answer: B) Conduction and radiation. 12. The amount of energy needed to change 1 kg of a substance by 1 degree celsius is its A) Thermal energy. B) Specific heat. C) Temperature. D) None of the above. Show Answer Correct Answer: B) Specific heat. 13. Gina takes some enchiladas out of the oven. Why would she use oven mitts? A) To have smoother hands. B) To not get dirty. C) To protect her hands. D) Because she wanted to be warmer. Show Answer Correct Answer: C) To protect her hands. 14. Choose the correct type of heat transfer:boiling water A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Convection. 15. What is an insulator? A) A material that heat moves through easily. B) A material that heat does not move through easily. C) A material that turns cold when heated. D) A tool for measuring temperature. Show Answer Correct Answer: B) A material that heat does not move through easily. 16. Which of the following materials will undergo convection? A) Liquid and gas. B) Gas and solid. C) Solid and liquid. D) Gas only. Show Answer Correct Answer: A) Liquid and gas. 17. ONE SHOULD PREFER TO WEAR WHICH DRESSES IN SUMMER DAYS A) DARK AND SYNTHETIC. B) LIGHT AND COTTON. C) LIGHT AND WOOLEN. D) DARK AND SILK. Show Answer Correct Answer: B) LIGHT AND COTTON. 18. Heat travels from cooler objects to warmer objects. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. Materials that do not transfer energy easily. A) Insulators. B) Conductors. C) Energy. D) Heat. Show Answer Correct Answer: A) Insulators. 20. Heat moves by ..... when it travels through waves. A) Radiation. B) Conduction. C) Insulator. D) Convection. Show Answer Correct Answer: A) Radiation. 21. How much heat energy is needed to raise the temperature of 2kg of water from 5 $^\circ$C to 100 $^\circ$C? The specific heat capacity of water is 4200 J/kg $^\circ$C. A) 42000 J. B) 840000 J. C) 798000 J. D) None of the above. Show Answer Correct Answer: C) 798000 J. 22. George holds an ice cube in his hand. As he squeezes the ice, it begins to melt. Which of the following best explains why this happens? A) George absorbs heat from the ice. B) Heat moves from Abdul's hand into the cube and warms it. C) Cold moves from the ice onto George's hand as it melts. D) George releases cold to the ice. Show Answer Correct Answer: B) Heat moves from Abdul's hand into the cube and warms it. 23. Which of the following is /are example of direct contact type heat exchanger? A) Jet condenser. B) Desuper heater. C) Cooling tower. D) All of the above. Show Answer Correct Answer: D) All of the above. 24. What is the SI unit for temperature? A) Kelvin. B) Celsius. C) Fahrenheit. D) All of these. Show Answer Correct Answer: A) Kelvin. 25. Holding an ice cube and holding a cup of tea are examples of what type of heat transfer? A) Conduction. B) Convection. C) Raditaion. D) Solar power. Show Answer Correct Answer: A) 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