This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 3 Heat – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 3 Heat Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. To change from a liquid to a solid A) Condensate. B) Evaporate. C) Freeze. D) Melt. Show Answer Correct Answer: C) Freeze. 2. 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 conduction from air. C) The temperature of the water remains the same. D) The temperature of the water increases due to radiation. Show Answer Correct Answer: B) The temperature of the water increases due to conduction from air. 3. 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. 4. What is the equation for specific heat capacity? A) $Q=mc\Delta T$. B) $Q=\frac{mc}{\Delta T}$. C) $Q=\frac{\Delta T}{mc}$. D) $Q=\frac{c\Delta T}{m}$. E) $Q=m\Delta cT$. Show Answer Correct Answer: A) $Q=mc\Delta T$. 5. On a hot day in the sun, why does Robert use a foam can holder to keep his drink cool? A) Foam insulates the cold drink. B) Foam reflects cold air from the can. C) Foam reflects heat from the sun off the can. D) Foam conducts heat between the can and the air. Show Answer Correct Answer: A) Foam insulates the cold drink. 6. Walking along the sand on the beach A) Convection. B) Conduction. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Conduction. 7. LT3:If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ..... A) One reaches a temperature of zero. B) They both have an equal temperature. C) One runs out of energy. D) None of the above. Show Answer Correct Answer: B) They both have an equal temperature. 8. Write true or false for each statement (a) Evaporation is rapid on a wet day. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 9. What are common sources of heat? A) Water, fire and air. B) Sun, chemical, and electrical. C) Stove, freezer and toaster. D) House, park and car. Show Answer Correct Answer: B) Sun, chemical, and electrical. 10. Which material would be the bestchoice for the handle of a cooking pot? A) Metal, it is string and durable. B) Plastic, it does not conduct heat. C) Glass, it is a good conductor of heat. D) Copper, it distributes heat evenly. Show Answer Correct Answer: B) Plastic, it does not conduct heat. 11. Unit of measurement for temperature. A) Millilitres. B) Kilometres. C) Kilograms. D) Degree Celcius. Show Answer Correct Answer: D) Degree Celcius. 12. What is the boiling point of water in Celsius? A) 100$^\circ$C. B) 0$^\circ$C. C) 50$^\circ$C. D) None of the above. Show Answer Correct Answer: A) 100$^\circ$C. 13. The transfer of heat which does not require any medium is called A) Conduction. B) Radiation. C) Convection. D) Vaporization. Show Answer Correct Answer: B) Radiation. 14. Choose a green house gas. A) Carbondioxide. B) Carbon monoxide. C) Oxygen. D) Nitrogen. Show Answer Correct Answer: A) Carbondioxide. 15. The movement of thermal energy from a warmer object to a cooler object is called A) Heat. B) Temperature. C) Motion. D) Momentum. Show Answer Correct Answer: A) Heat. 16. Warm air over the beach rises while cooler, dense air from the ocean rushes in due to A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 17. A Room Heater is kept on stool in the corner of room. What type of heat transfer is happening? A) Conduction. B) Convection. C) Radiation. D) None of these. Show Answer Correct Answer: C) Radiation. 18. What is the melting point of ice in Celsius? A) 0$^\circ$C. B) 100$^\circ$C. C) 50$^\circ$C. D) None of the above. Show Answer Correct Answer: A) 0$^\circ$C. 19. This type of material allows heat to pass through it easily. A) Conductor. B) Insulator. C) Water. D) Degrees. Show Answer Correct Answer: A) Conductor. 20. A clinical Thermometer should be ..... before and after use, preferably with an ..... solution. A) Muddy, unsaturated. B) Slimy, lime and water. C) Tasty, noodles and masala. D) Washed, antiseptic. Show Answer Correct Answer: D) Washed, antiseptic. 21. Which is NOT a way that heat can be produced? A) Electricity. B) Rubbing your hands together. C) Fire. D) Rain. Show Answer Correct Answer: D) Rain. 22. In how many categories heat exchangers are classified on the basis of physical state of heat exchanging fluids? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 23. Which type of heat transfer is responsible for the warmth we feel from the sun? A) Evaporation. B) Convection. C) Radiation. D) Conduction. Show Answer Correct Answer: C) Radiation. 24. Energy that is transferred from hotter objects to cooler objects is ..... A) Thermal/Heat. B) Temperature. C) Electricity. D) Conduction. Show Answer Correct Answer: A) Thermal/Heat. 25. A pot of 2400g of water at a temperature of 25$^\circ$C is heated on a stove until the water boils (100$^\circ$C). The specific heat of water is 4.18 J/(g$^\circ$C).Determine the heat energy needed to heat the water in the pot to boiling. A) 133.Stager. B) 43, 062.g. C) 752, 400J. D) 1, 003, 200J. Show Answer Correct Answer: C) 752, 400J. ← 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