This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. (d) Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 2. Four objects made of Steel(P), bronze(Q), wood(R) and mica(S) is lying in the room during winter season. Which of the objects will appear warmer of touch? A) Q and R. B) P and Q. C) R and S. D) P and S. Show Answer Correct Answer: C) R and S. 3. Near the ceiling of a room the air is warmer; the warm air rises because of A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 4. Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then A) The solid rod A expands more than the hollow rod B. B) The hollow rod B contracts, but the solid rod A expands. C) Both the rods A and B expand the same. D) The hollow rod B expands more than the solid rod A. Show Answer Correct Answer: C) Both the rods A and B expand the same. 5. What is Thermal Contraction A) The movement of particles. B) A decrease in a materials volume when its temperature decreases. C) The movement of fluids in a cycle because of convection. D) A material through which thermal energy does not flow easily. Show Answer Correct Answer: B) A decrease in a materials volume when its temperature decreases. 6. Thermal energy is energy that comes from A) Cooling. B) Heat. C) Ice. D) Water. Show Answer Correct Answer: B) Heat. 7. The more particles an object has a given temperature A) The higher its temperature. B) The more thermal energy it has. C) The more degrees it has. D) The more kelvins it has. Show Answer Correct Answer: B) The more thermal energy it has. 8. ..... is a measure of the average kinetic energy of the particles in a material. A) Thermal. B) Friction. C) Temperature. D) Expansion. Show Answer Correct Answer: C) Temperature. 9. The efficiency of carnot cycle may be increased by ..... A) Increasing the highest temperature. B) Decreasing the highest temperature. C) Increasing the lowest temperature. D) Decreasing the lowest temperature. Show Answer Correct Answer: D) Decreasing the lowest temperature. 10. Which type of heat transfer does not require a medium to transfer heat? A) Evaporation. B) Convection. C) Radiation. D) Conduction. Show Answer Correct Answer: C) Radiation. 11. Which of the following is an example of radiation? A) Macaroni moving around in a pot of boiling water. B) Steam rising form a boiling pot of grits being cooked. C) The sun shining through a window and warming a table. D) Bacon frying in a pan. Show Answer Correct Answer: C) The sun shining through a window and warming a table. 12. Gas is trapped in a closed container. There exists gas pressure inside the container because gas molecules A) Move randomly. B) Move with equal speed. C) Collide with one another. D) Collide constantly with the walls of container. Show Answer Correct Answer: D) Collide constantly with the walls of container. 13. Sweat evaporates from your skin and you feel cooler. A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Convection. 14. The specific heat of aluminum is 0.21 J/g$^\circ$C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100$^\circ$ to 50$^\circ$? A) 105 J. B) 10.5 J. C) 1.05 J. D) 1050 J. Show Answer Correct Answer: A) 105 J. 15. TRANSFER OF HEAT DUE TO THE CONVECTION OCCUR IN A) SOLIDS. B) LIQUIDS. C) GASES. D) B AND C. Show Answer Correct Answer: D) B AND C. 16. Heat reaches us on Earth from Sun through the process of ..... A) Conduction. B) Convection. C) Radiation. D) None of them. Show Answer Correct Answer: C) Radiation. 17. What is the specific heat capacity of water? A) 1 J/g * C. B) 2.245 J/g * C. C) 8.148 J/g * C. D) 4.184 J/g * C. Show Answer Correct Answer: D) 4.184 J/g * C. 18. The internal energy U is a unique function of any state of a substance because change in U A) Does not depend upon the path. B) Depends upon the path. C) Corresponds to an adiabatic process. D) Corresponds to an isothermal process. Show Answer Correct Answer: A) Does not depend upon the path. 19. The temperature at which a liquid boils and changes rapidly into a gas at a atmospheric pressure A) Melting. B) Boiling. C) Condensation. D) Freezing. Show Answer Correct Answer: B) Boiling. 20. When the particles of an object move faster, what happens to the temperature? A) The temperature goes up. B) The temperature stays the same. C) The temperature goes down. D) The temperature cannon be taken. Show Answer Correct Answer: A) The temperature goes up. 21. Which of the following is an example of heat transfer through radiation? A) A microwave oven heating food. B) A metal spoon getting hot in a cup of hot coffee. C) Warm air rising from a heater. D) A pot of water boiling on a stove. Show Answer Correct Answer: A) A microwave oven heating food. 22. Popping popcorn in the microwave A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 23. This is a form of energy that causes materials to become warmer or hotter. A) Temperature. B) Heat. C) Thermometer. D) None of the above. Show Answer Correct Answer: B) Heat. 24. Solar energy comes from water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 25. Sally is eating hot soup with a metal spoon. When she touches the spoon it burns her hand. How was the heat transferred to her hand? A) Conduction. B) Radiation. C) Convection. D) Reflection. 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