This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The Sun is the source of heat in a desert. The body temperatures of reptiles, like lizards, change with their environment. Which statement describes how the heat of the sand affects the lizard's body as it comes out of the shade? A) The sand gets cooler when then lizard walks across it. B) The lizard's body temperature increases. C) The sand gets warmer when the lizard lays down. D) The lizard's body temperature decreases. Show Answer Correct Answer: B) The lizard's body temperature increases. 2. Heat rises. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. Lyric rubs her hands on her arms because she is cold. Her arms warm up.Which question could you to identify the heat source A) Do her arms get warmer when she draws a picture?. B) Do her arms get warmer if she wears green?. C) Where is she located?. D) Would she have the same result if she was still?. Show Answer Correct Answer: D) Would she have the same result if she was still?. 4. What is thermal energy? A) Energy that comes from heat. B) A compass. C) Something to tell the temperature with. D) I soup can. Show Answer Correct Answer: A) Energy that comes from heat. 5. A clinical thermometer reads temperature between A) 30$^{o}$C to 40$^{o}$ C. B) 30$^{o}$C to 45$^{o}$ C. C) -30$^{o}$C to 45$^{o}$ C. D) 35$^{o}$C to 42$^{o}$ C. Show Answer Correct Answer: D) 35$^{o}$C to 42$^{o}$ C. 6. In case of ..... the cool air moves from the land towards the sea A) Land breeze. B) Ice breeze. C) Sea breeaze. D) Sand breeze. Show Answer Correct Answer: A) Land breeze. 7. This type of heat transfer occurs when objects are touching. A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 8. Macaroni rises and falls in a pot of heated water. A) Conduction. B) Convection. C) Radiation. D) Dinner. Show Answer Correct Answer: B) Convection. 9. Ventilation in rooms is due to A) Conduction. B) Convection. C) Radiation. D) All of the three. Show Answer Correct Answer: B) Convection. 10. A ..... is a unit of heat equal to 1, 000 great calories. A) Thermos. B) Therm. C) Thermograph. D) Thermophile. Show Answer Correct Answer: B) Therm. 11. What do we call materials that let heat pass through them easily? A) Conductors. B) Insulators. C) Transparent. D) None of the above. Show Answer Correct Answer: A) Conductors. 12. To measure the temperature difference between two cups of water, you would use a ..... A) Measuring cup. B) Ruler. C) Thermometer. D) Balance scale. Show Answer Correct Answer: C) Thermometer. 13. What is the mode of heat transfer when the sun heats your body? A) Conduction. B) Convection. C) Density. D) Radiation. Show Answer Correct Answer: D) Radiation. 14. In nature, heat always flows from a: A) Cold object to a warm object. B) Small object to a big object. C) Warm object to a cold object. D) Large object to a small object. Show Answer Correct Answer: C) Warm object to a cold object. 15. Heat and Temperature are the same thing A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. Temperature of boiling water cannot be measured by a ..... thermometer A) Clinical thermometer. B) Laboratory thermometer. C) Normal thermometer. D) None of the above. Show Answer Correct Answer: A) Clinical thermometer. 17. Land heats up and cools down faster than water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. The principle of method of mixtures A) Heat gain by hot body is equal to heat lost by cold. B) Heat gain by heavier body is equal to heat lost by lighter body. C) Heat gained by cold body is equal to heat lost by hot body. D) All the above. Show Answer Correct Answer: C) Heat gained by cold body is equal to heat lost by hot body. 19. Which is NOT en example of heat energy? A) Burning something. B) Mixing one substance with another. C) Rubbing objects together. D) The Sun. E) Thinking really hard. Show Answer Correct Answer: E) Thinking really hard. 20. How many heat zones are there? A) 4. B) 3. C) 1. D) 2. Show Answer Correct Answer: B) 3. 21. 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. 22. How do molecules move in a hot object? A) They don't move. B) Slowly. C) Quickly. D) Normal speed. Show Answer Correct Answer: C) Quickly. 23. 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. 24. (c) The correct statement is A) Iron rims are cooled before they are placed on the cartwheels. B) A glass stopper gets tighten on warming the neck of the bottle. C) Telephone wires sag in winter, but become tight in summer. 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. 25. 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. ← 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