This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Heat > Class 7 Science Chapter 3 Heat – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Water can exist as a flowing ..... , seen in rivers or streams. A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: B) Liquid. 2. How do molecules move in a hot object? A) Quickly. B) Normal speed. C) They don't move. D) Slowly. Show Answer Correct Answer: A) Quickly. 3. What happens with air if temperature increases? A) The air rises. B) The air sinks. C) The air move side ward. D) The air move vertically. Show Answer Correct Answer: A) The air rises. 4. (c) The correct statement is A) A glass stopper gets tighten on warming the neck of the bottle. B) Telephone wires sag in winter, but become tight in summer. C) Iron rims are cooled before they are placed on the cartwheels. D) A little space is left between two rails on a railway track. Show Answer Correct Answer: D) A little space is left between two rails on a railway track. 5. Take a piece of wood and a piece of metal keep them in fridge or ice box. After 15 minutes, upon taking them out we find A) Wooden piece is colder. B) Metal piece is colder. C) Both are having same coldness. D) None of these. Show Answer Correct Answer: B) Metal piece is colder. 6. The amount of heat energy required to raise the temperature of one gram of water by one degree celsius from 14.5 to 15.5 degree celsius is A) Joule. B) Calorie. C) Kilocalorie. D) Newton meter. Show Answer Correct Answer: B) Calorie. 7. A thermometer contains ..... A) Mercury. B) Silver. C) Water. D) Copper. Show Answer Correct Answer: A) Mercury. 8. When air is heated, what happens to its mass? A) Increases. B) Decreases. C) Remains the same. D) None of the above. Show Answer Correct Answer: C) Remains the same. 9. One kilocalorie is A) 100 joules. B) 4186 joules. C) 4900 joules. D) 1000 joules. Show Answer Correct Answer: B) 4186 joules. 10. What is the atomic number of oxygen? A) 5. B) 17. C) Sandwich. D) 8. Show Answer Correct Answer: D) 8. 11. A ..... is an object that allows heat to move through easily. A) Convection. B) Conductor. C) Friction. D) Insulator. Show Answer Correct Answer: B) Conductor. 12. A tool used to measure temperature is called a ..... A) Balance. B) Scale. C) Thermometer. D) Measurement. Show Answer Correct Answer: C) Thermometer. 13. What is convection? A) The transfer of heat in liquids. B) The transfer of heat in solids. C) The transfer of heat in gases. D) The transfer of heat in liquids and gases. Show Answer Correct Answer: D) The transfer of heat in liquids and gases. 14. What are the accepted units for specific heat capacity? A) J. B) J/g. C) G/J * C. D) J/g * C. Show Answer Correct Answer: D) J/g * C. 15. Steve rubs his hands together to warm them on a cold day. Which is he using to warm his hands? A) Friction. B) Magnetism. C) Gravity. D) Conduction. Show Answer Correct Answer: A) Friction. 16. Heat energy makes particles move A) Slower. B) Faster. C) Same. D) None of the above. Show Answer Correct Answer: B) Faster. 17. Solid, liquids and gases are called the three ..... A) Water types. B) Big ideas. C) States of matter. D) None of the above. Show Answer Correct Answer: C) States of matter. 18. BECAUSE OF LOW PRESSURE ON OCEAN RAINFALL TAKES PLACE.LOW PRESSURE IS CREATED IN THE ATMOSPHERE DUE TO SUN. NAME THE METHOD OF HEAT TRANSFER IN THIS CASE. A) CONDUCTION. B) CONVECTION. C) RADIATION. D) NONE OF THE ABOVE. Show Answer Correct Answer: B) CONVECTION. 19. On a hot day the lake water warms and the temperature increases. How does the movement of the particles change? A) Move slower and farther apart. B) Move slower and closer together. C) Move faster and farther apart. D) Move faster and closer together. Show Answer Correct Answer: C) Move faster and farther apart. 20. The upper standard point on the Fahrenheit scale is ..... A) 100 $^\circ$. B) 180 $^\circ$. C) 120 $^\circ$. D) 212 $^\circ$. Show Answer Correct Answer: D) 212 $^\circ$. 21. What is boiling point of water at celciuis scale? A) 0 degrees. B) 100 degrees. C) 27 degrees. D) 50 degrees. Show Answer Correct Answer: B) 100 degrees. 22. Which is the best example of conduction? A) Boiling a pot of water. B) Feeling heat from a fireplace. C) A hot air balloon rising and falling. D) Touching a hot handle and getting burned. Show Answer Correct Answer: D) Touching a hot handle and getting burned. 23. What are some common applications of heat transfer in everyday life? A) Boiling eggs, melting ice, drying hair. B) Baking, freezing food, lighting candles. C) Cooking, boiling water, heating rooms, cooling drinks, ironing clothes. D) Heating cars, cooling laptops, warming blankets. Show Answer Correct Answer: C) Cooking, boiling water, heating rooms, cooling drinks, ironing clothes. 24. Cold air from the air conditioner is felt in the entire room. A) Radiation. B) Convection. C) Conduction. D) None of the above. Show Answer Correct Answer: B) Convection. 25. Which of the following is NOT an insulator? A) Copper. B) Wool. C) Plastic. D) Styrofoam. Show Answer Correct Answer: A) Copper. 26. The material in a lava lamp rises and falls. A) Conduction. B) Convection. C) Energy. D) Radiation. Show Answer Correct Answer: B) Convection. 27. Which of the following statements is TRUE about the Torrid Zone? A) It is located around the Equator. B) It experiences hot climate throughout the year. C) It receives vertical sunrays. D) All of the above. Show Answer Correct Answer: D) All of the above. 28. On which surface would you ride your bike the fastest? A) Concrete. B) Grass. C) Soil. D) None of the above. Show Answer Correct Answer: A) Concrete. 29. Touching hot sand is ..... A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 30. Rubber is considered an ..... A) Conductor. B) Insulator. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Insulator. 31. (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. 32. 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. 33. 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. 34. 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. 35. What is Thermal Contraction A) A material through which thermal energy does not flow easily. B) The movement of fluids in a cycle because of convection. C) A decrease in a materials volume when its temperature decreases. D) The movement of particles. Show Answer Correct Answer: C) A decrease in a materials volume when its temperature decreases. 36. Thermal energy is energy that comes from A) Heat. B) Cooling. C) Water. D) Ice. Show Answer Correct Answer: A) Heat. 37. The more particles an object has a given temperature A) The more kelvins it has. B) The more thermal energy it has. C) The higher its temperature. D) The more degrees it has. Show Answer Correct Answer: B) The more thermal energy it has. 38. ..... is a measure of the average kinetic energy of the particles in a material. A) Friction. B) Thermal. C) Temperature. D) Expansion. Show Answer Correct Answer: C) Temperature. 39. The efficiency of carnot cycle may be increased by ..... A) Decreasing the lowest temperature. B) Increasing the highest temperature. C) Increasing the lowest temperature. D) Decreasing the highest temperature. Show Answer Correct Answer: A) Decreasing the lowest temperature. 40. Which type of heat transfer does not require a medium to transfer heat? A) Conduction. B) Convection. C) Evaporation. D) Radiation. Show Answer Correct Answer: D) Radiation. 41. 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. 42. 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. 43. 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. 44. 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) 1050 J. B) 105 J. C) 1.05 J. D) 10.5 J. Show Answer Correct Answer: B) 105 J. 45. 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. 46. 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. 47. What is the specific heat capacity of water? A) 4.184 J/g * C. B) 1 J/g * C. C) 8.148 J/g * C. D) 2.245 J/g * C. Show Answer Correct Answer: A) 4.184 J/g * C. 48. The internal energy U is a unique function of any state of a substance because change in U A) Corresponds to an isothermal process. B) Does not depend upon the path. C) Depends upon the path. D) Corresponds to an adiabatic process. Show Answer Correct Answer: B) Does not depend upon the path. 49. The temperature at which a liquid boils and changes rapidly into a gas at a atmospheric pressure A) Melting. B) Condensation. C) Boiling. D) Freezing. Show Answer Correct Answer: C) Boiling. 50. When the particles of an object move faster, what happens to the temperature? A) The temperature stays the same. B) The temperature cannon be taken. C) The temperature goes up. D) The temperature goes down. Show Answer Correct Answer: C) The temperature goes up. 51. 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. 52. Popping popcorn in the microwave A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 53. 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. 54. Solar energy comes from water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 55. 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) Radiation. B) Convection. C) Reflection. D) Conduction. Show Answer Correct Answer: D) Conduction. 56. Heat transfers from ..... objects to cold objects. A) Cold. B) Hot. C) Radiation. D) Convection. Show Answer Correct Answer: B) Hot. 57. A cold spoon is placed inside a cup of hot lemon tea. Which of the following is correct? A) Temperature flows from the tea to the spoon. B) Heat flows from the tea to the spoon. C) Temperature flows from the spoon to the tea. D) Heat flows from the spoon to the tea. Show Answer Correct Answer: B) Heat flows from the tea to the spoon. 58. In a vaccum flask the silvered walls reduce the heat transfer caused by- A) Radiation. B) Convection. C) Conduction. D) None of the above. Show Answer Correct Answer: A) Radiation. 59. Temperature is the measurement of the average ..... energy of the molecules in an object A) Kinetic. B) Heat. C) Motion. D) None of the above. Show Answer Correct Answer: A) Kinetic. 60. Which will not undergo sublimation? A) Camphor. B) Sodium chloride. C) Ammonium chloride. D) Iodine. Show Answer Correct Answer: B) Sodium chloride. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books