This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Heat > Class 7 Science Chapter 3 Heat – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. 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. 3. 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. 4. Materials that do not transfer energy easily. A) Insulators. B) Energy. C) Conductors. D) Heat. Show Answer Correct Answer: A) Insulators. 5. Heat moves by ..... when it travels through waves. A) Insulator. B) Convection. C) Conduction. D) Radiation. Show Answer Correct Answer: D) Radiation. 6. 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. 7. 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. 8. 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. 9. 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. 10. The process in which a liquid substance changes into a gas rapidly on heating, is called ..... A) Boiling. B) Condensation. C) Melting. D) Vaporization. Show Answer Correct Answer: A) Boiling. 11. The unit of measurement of temperature is ..... A) Degree celsius. B) Kilogram. C) Second. D) Metre. Show Answer Correct Answer: A) Degree celsius. 12. Clinical thermometers present in used in India are marked with a temperature scale, This scale corresponds to which of the following A) Celsius. B) Farenheit. C) Both Celsius and Farenheit. D) None of these. Show Answer Correct Answer: A) Celsius. 13. In art class, the students watch a video about creating glass art. Which statement best describes how glass is shaped into a vase? A) Glass is melted and is more flexible to shape. B) Glass is frozen and is more flexible to shape. C) Glass is melted and is less flexible to shape. D) Glass is frozen and is less flexible to shape. Show Answer Correct Answer: A) Glass is melted and is more flexible to shape. 14. Select the correct alternativea) In evaporation A) All molecules of liquid begin to escape out. B) . only the molecules at the surface escape out. C) The temperature of the liquid rises by absorbing heat from the surroundings. D) None of the above. Show Answer Correct Answer: B) . only the molecules at the surface escape out. 15. Thermal expansion is A) A measure of the kinetic energy. B) All the energy of all the particles. C) The increase in volume of a substance due to an increase in temperature. D) None of the above. Show Answer Correct Answer: C) The increase in volume of a substance due to an increase in temperature. 16. On a sunny day, Yolanda fills a small backyard pool with water. As time passes, the water warms. Which statement explains this effect? A) The sun heats the water through gravity. B) The sun heats the water through radiation. C) The sun heats the water through convection. D) None of the above. Show Answer Correct Answer: B) The sun heats the water through radiation. 17. What does temperature measure? A) $^\circ$C. B) Thermal Energy. C) Heat. D) Kinetic Energy. Show Answer Correct Answer: D) Kinetic Energy. 18. When a liquid SLOWLY changes into a gas it ..... A) Condenses. B) Evaporates. C) All the above. D) None of the above. Show Answer Correct Answer: B) Evaporates. 19. How does the community around Michael influence his actions in 'Heat'? A) They discourage him from playing baseball. B) They support and encourage his baseball career. C) They are indifferent to his sports activities. D) They report him to the authorities. Show Answer Correct Answer: B) They support and encourage his baseball career. 20. A thermos flask is made up of double-walled glass vessel because- A) Glass is a good conductor of heat. B) Glass is a poor conductor of heat. C) Thermos flask is not made of glass vessel. D) None of the above. Show Answer Correct Answer: B) Glass is a poor conductor of heat. 21. To locate exact places on the earth, one must look at A) The lines of longitude only. B) The lines of latitude only. C) The intersecting lines of latitude and longitude. D) A neighboring area to describe the location. Show Answer Correct Answer: C) The intersecting lines of latitude and longitude. 22. If you dropped a hot rock in a bucket of cold water, the rock will ..... A) Stay the same temperature. B) Melt. C) Become cooler. D) Become hotter. Show Answer Correct Answer: C) Become cooler. 23. *The simplest type of heat exchanger*One fluid flows through the smaller pipe while the other fluid flows through the annular space Statements above describe what type of heat exchanger? A) Plate and frame. B) Shell and tube. C) Double pipe. D) Compact. Show Answer Correct Answer: C) Double pipe. 24. Which of the following is a correct pair of insulators A) Paper, . Silver. B) Iron, silver. C) Silver, plastic. D) Wood, plastic. Show Answer Correct Answer: D) Wood, plastic. 25. What color absorbs light (meaning the object stays warmer)? A) Pink. B) Orange. C) Black. D) White. Show Answer Correct Answer: C) Black. 26. A piece of copper alloy with a mass of 85.0 g if heated from 30.0$^\circ$C to 45$^\circ$C. In the process, it absorbs 523 J of energy as heat. What is the specific heat of the copper? A) 0.41 J/g$^\circ$C. B) 0.29 J/g$^\circ$C. C) 0.73 J/g$^\circ$C. D) 0.57 J/g$^\circ$C. Show Answer Correct Answer: A) 0.41 J/g$^\circ$C. 27. Justin climbed to the top of a rope during P.E. class. While he climbed, his hands rubbed against the rough rope. When he came down, his hands were very warm.Which source of heat MOST LIKELY caused the student's hands to warm up? A) Air conditioning. B) Friction (Rubbing). C) The Sunlight. D) Coach Shirley. Show Answer Correct Answer: B) Friction (Rubbing). 28. 20 degree celcius= A) 293 K. B) 273 k. C) 173 K. D) 193 K. Show Answer Correct Answer: A) 293 K. 29. ..... is a measure of how hot or cold something is A) Humidity. B) Precipitation. C) Water. D) Temperature. Show Answer Correct Answer: D) Temperature. 30. The increase in area of a solid when heated is called ..... A) Superficial expansion. B) Cubical expansion. C) Thermal expansion. D) Linear expansion. Show Answer Correct Answer: A) Superficial expansion. 31. The measure of average kinetic energy of all the particles within an object is called ..... A) Temperature. B) Conduction. C) Radiation. D) Heat. Show Answer Correct Answer: A) Temperature. 32. A sea breeze is created when hot air rises and cooled air sinks. What type of heat transfer is this? A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 33. Which tool is the most useful for finding the temperature at which water freezes? A) A graduated cylinder. B) A balance. C) A thermometer. D) A ruler. Show Answer Correct Answer: C) A thermometer. 34. When a metal rod is heated at one end, the heat travels to the other end. What is this process called? A) Radiation. B) Conduction. C) Evaporation. D) Convection. Show Answer Correct Answer: B) Conduction. 35. The ..... zone lies just north of the Arctic Circle. A) North temperate zone. B) North frigid zone. C) South frigid zone. D) None of the above. Show Answer Correct Answer: B) North frigid zone. 36. One end of a metal rod is placed over a flame during an investigation. A thermometer is touching the opposite end of the metal rod. Which BEST describes what is happening during this investigation? A) Radiant energy warms the thermometer. B) Convection carries heat to the thermometer. C) Mechanical energy from the flame carries heat to the thermometer. D) Heat from the flame is conducted through the metal rod to the thermometer. Show Answer Correct Answer: D) Heat from the flame is conducted through the metal rod to the thermometer. 37. Boiling water, a fire, a lava lamp and a cool sea breeze are examples of what type of heat transfer? A) Solar. B) Radiation. C) Conduction. D) Convection. Show Answer Correct Answer: D) Convection. 38. What is the main mode of heat transfer in liquids? A) Radiation. B) Conduction. C) Convection. D) Evaporation. Show Answer Correct Answer: C) Convection. 39. What is the purpose of using baffles in shell-and-tube heat exchangers? A) To enhance heat transfer. B) To maintain uniform spacing between tubes. C) Both. D) None. Show Answer Correct Answer: C) Both. 40. Which of these is the best heat conductor? A) Rubber glove. B) A block of wood. C) Cloth pot holder. D) Metal pan. Show Answer Correct Answer: D) Metal pan. 41. One degree Celsius rise in temperature is equal to ..... A) 1 degree rise on the Kelvin scale. B) 1 degree rise on the Fahrenheit scale. C) Both (a) and (b). D) 1 degree fall on the Kelvin scale. Show Answer Correct Answer: A) 1 degree rise on the Kelvin scale. 42. ..... THERMOMETERS RANGE IS 35$^{0}$C TO 42$^{0}$. A) LABORATORY. B) MAXIMUM AND MINIMUM. C) CLINICAL. D) ALL. Show Answer Correct Answer: C) CLINICAL. 43. What is the scientific definition of temperature? A) Temperature is how hot or cold something is. B) Temperature in Fahrenheit. C) Temperature in Celsius. D) Temperature is the speed of the molecules in an object. Show Answer Correct Answer: D) Temperature is the speed of the molecules in an object. 44. Give an example of radiation. A) Infrared radiation from a heater. B) Microwaves from a microwave oven. C) Ultraviolet light from the sun. D) X-rays from a medical imaging machine. Show Answer Correct Answer: C) Ultraviolet light from the sun. 45. THE TRANSFER OF HEAT FROM HOT BODY TO COLD BODY DIRECTLY WITHOUT HEATING THE SPACE IN BETWEEN IS KNOWN AS A) CONDUCTION. B) CONVECTION. C) RADIATION. D) NONE OF THESE. Show Answer Correct Answer: C) RADIATION. 46. True or False:A thermal conductor transfers heat well between two objects, and the heat does not stay in one place. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 47. How does heat transfer impact climate change? A) Heat transfer leads to cooling of the Earth's atmosphere. B) Heat transfer impacts climate change by influencing the distribution of energy in the Earth's atmosphere and oceans, leading to global warming and its associated effects. C) Climate change is solely caused by natural factors. D) Heat transfer has no impact on climate change. Show Answer Correct Answer: B) Heat transfer impacts climate change by influencing the distribution of energy in the Earth's atmosphere and oceans, leading to global warming and its associated effects. 48. Hot air rising from a campfire is ..... A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 49. For a skillet, used for cooking, do you want a high or low specific heat A) High, so that it will need more energy to heat up. B) Low, so that it will change temperature quickly. C) All the above. D) None of the above. Show Answer Correct Answer: B) Low, so that it will change temperature quickly. 50. Which thermometer is used to measure temperature of an object? A) Clinical thermometer. B) Laboratory thermometer. C) Maximum minimum thermometer. D) None of the above. Show Answer Correct Answer: B) Laboratory thermometer. 51. A measure of the AVERAGE kinetic energy of particles in an object is called A) Convection. B) Thermal energy. C) Conduction. D) Temperature. Show Answer Correct Answer: D) Temperature. 52. An air conditioner cools a room. The cool air sinks and the warmer air rises. This is an example of A) Conduction. B) Convection. C) Constipation. D) Radiation. Show Answer Correct Answer: B) Convection. 53. 1kg of water cools from 100C to 20C. What is true A) It takes in 336 J. B) It doesn't take in or give out any energy. C) It gives out 336 kJ. D) It takes in 336 kJ. E) It gives out 336 J of energy. Show Answer Correct Answer: C) It gives out 336 kJ. 54. The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 $^\circ$C to 35.0 $^\circ$C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal? A) -1.17 J/g$^\circ$C. B) -0.857 J/g$^\circ$C. C) 1.17 J/g$^\circ$C. D) 0.857 J/g$^\circ$C. Show Answer Correct Answer: C) 1.17 J/g$^\circ$C. 55. Many objects, such as train tracks and road joints, are specifically designed to allow extra space for ..... A) Specific heat. B) Thermal expansion. C) Conductors. D) Thermal energy. Show Answer Correct Answer: B) Thermal expansion. 56. The heat from a lamp allows this lizard to remain warm. This is an example of which type of heat transfer? A) Radiation. B) Convection. C) Conduction. D) None of the above. Show Answer Correct Answer: A) Radiation. 57. "Thermal" stands for- A) Temperature. B) Expans. C) Heat. D) Energy. Show Answer Correct Answer: C) Heat. 58. A student places a glass of cold water in a warm room. After sometime, what happens to the temperature of the water and why? A) The temperature of the water decreases due to evaporation. B) The temperature of the water increases due to radiation. C) The temperature of the water increases due to conduction from air. D) The temperature of the water remains the same. Show Answer Correct Answer: C) The temperature of the water increases due to conduction from air. 59. Heat transfers from a heater by ..... A) Conduction and radiation. B) Radiation and convection. C) Conduction and convection. D) Radiation only. Show Answer Correct Answer: B) Radiation and convection. 60. What is the equation for specific heat capacity? A) $Q=\frac{c\Delta T}{m}$. B) $Q=\frac{mc}{\Delta T}$. C) $Q=m\Delta cT$. D) $Q=\frac{\Delta T}{mc}$. E) $Q=mc\Delta T$. Show Answer Correct Answer: E) $Q=mc\Delta T$. ← 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