This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 39 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Everyday the earth is warmed by the sun. What kind of heat transfer is taking place in this process? A) Radiation. B) Conduction. C) Convection. D) What is a 'sun'?. Show Answer Correct Answer: A) Radiation. 2. An ice cube feels cold when we hold it. Which of the following best explains why? A) Heat moves from our hands into the ice cube. B) Cold moves from our hands into the ice cube. C) Heat moves from the ice cube into our hands. D) Cold moves from the ice cube into our hands. Show Answer Correct Answer: A) Heat moves from our hands into the ice cube. 3. According to principle of method of mixtures A) Net heat lost=Net heat gain. B) Net heat lost>Net heat gain. C) Net heat lost D) All the above. Show Answer Correct Answer: A) Net heat lost=Net heat gain. 4. Which description defines heat? A) Total thermal energy of an object or substance. B) Change in the temperature of a substance in degrees Celsius. C) Energy transferred between objects at different temperatures. D) Average kinetic energy of the particles that make up a substance. Show Answer Correct Answer: C) Energy transferred between objects at different temperatures. 5. The process of changing a ..... into a solid by cooling is called freezing. A) Gas. B) Liquid. C) All the above. D) None of the above. Show Answer Correct Answer: B) Liquid. 6. Which of the following shows heat gain? A) Water turning into ice. B) Shivering in a cold room. C) Ice cream melting under the sun. D) Hot bowl of soup became room temperature. Show Answer Correct Answer: C) Ice cream melting under the sun. 7. How is heat transferred through conduction? A) Direct contact between particles in a material. B) Heat transferred through reflection. C) Heat transferred through convection. D) Heat transferred through radiation. Show Answer Correct Answer: A) Direct contact between particles in a material. 8. As you travel from west to east, does it get later or earlier? A) Earlier. B) Later. C) All the above. D) None of the above. Show Answer Correct Answer: B) Later. 9. Which of the following wordsmeans, "half of a sphere" ? A) Prime Meridian. B) Equator. C) Latitude. D) Hemisphere. Show Answer Correct Answer: D) Hemisphere. 10. Which diagram best represents the direction that heat energy will flow during transfer? A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 11. Transfer of energy between solids by direct contact is: A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 12. Mitch read that rubbing skin on skin creates more friction than rubbing skin on paper. How could he best test this? A) He could rub his hands on a doorknob, then on paper. B) He could rub two pieces of paper together. C) He could rub his hands together, then on a piece of paper on a table. D) He could rub his hands together inside his classroom, then outside. Show Answer Correct Answer: C) He could rub his hands together, then on a piece of paper on a table. 13. What scale does the United States use to measure temperature? A) Kelvin. B) Fahrenheit. C) Celsius. D) None of the above. Show Answer Correct Answer: B) Fahrenheit. 14. What is the specific heat of an unknown substance if 100.0 g of it at 200.0 $^\circ$C reaches an equilibrium temperature of 27.1 $^\circ$C when it comes in contact with a calorimeter of water. The water weighs 75. g and had an initial temperature of 20.00 $^\circ$C? (Specific heat of water is 4.18 J/g$^\circ$C) A) 0.111 J/g$^\circ$C. B) 1.29 J/g$^\circ$C. C) 0.129 J/g$^\circ$C. D) 22225.85 J. Show Answer Correct Answer: C) 0.129 J/g$^\circ$C. 15. What are waves that can transfer heat through the vacuum of empty space? A) Electromagnetic waves. B) Convection. C) Conduction. D) Heat. Show Answer Correct Answer: A) Electromagnetic waves. 16. The specific heat of platinum is 0.133 J/g$^\circ$C. How much heat(Q) is released when a 10 g piece of platinum cools from 100$^\circ$C to 50$^\circ$C? A) 66.5 J. B) 665 J. C) 0.0266 J. D) 0.665 J. Show Answer Correct Answer: A) 66.5 J. 17. The reading of the thermometer in hot water A) Increases. B) Decreases. C) Remains constant. D) None of above. Show Answer Correct Answer: A) Increases. 18. Hot objects begin to cool as A) Cooler air is transferred to the object. B) Energy in the object is transferred to the surrounding air. C) Atoms in the object react with the oxygen in the air. D) Energy in the object cancel out energy in the air. Show Answer Correct Answer: B) Energy in the object is transferred to the surrounding air. 19. How does heat from thermal energy move? A) Moves from hot to cold. B) Moves from cold to hot. C) Moves up and never down. D) Moves from side to side. Show Answer Correct Answer: A) Moves from hot to cold. 20. Anya placed an ice cube on the sidewalk on a warm day. The ice cube soon melted to form a puddle. What process caused the ice cube to melt? A) Heat transferred through the ice cube by convection. B) Heat transferred from the air to the ice cube by radiation. C) Heat transferred from the air and the pavement by conduction. D) Heat transferred through the ice cube into the pavement by conduction. Show Answer Correct Answer: C) Heat transferred from the air and the pavement by conduction. 21. What is the meaning of convection? A) Cold rises heat falls. B) Heat. C) Cold. D) Hot rises cold falls. Show Answer Correct Answer: D) Hot rises cold falls. 22. The calibration on clinical thermometer is from A) 35$^{o}$C to 42$^{o}$C. B) 32$^{o}$C to 45$^{o}$C. C) 0$^{o}$C to 100$^{o}$C. D) 10$^{o}$C to 110$^{o}$C. Show Answer Correct Answer: A) 35$^{o}$C to 42$^{o}$C. 23. Which statement describes the transfer of energy when an ice cube is placed in a cup of hot tea? A) Heat flows from the tea to the ice. B) Cold flows from the ice to the tea. C) Cold flows from the ice, and heat flows from the tea. D) Heat flows simultaneously between the ice and the tea. Show Answer Correct Answer: A) Heat flows from the tea to the ice. 24. Heat is energy A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 25. Smoke stays low. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← 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