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Class 7 Science Chapter 3 Heat Quiz 11 (60 MCQs)

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1. ..... objects in a fire can produce heat.
2. What unit do you use to measure Thermal Energy (q)?
3. Heat transfer through liquid and gases
4. ..... is measured by the unit Joules.
5. How much energy is required to raise 85.36 g of water from 18.5$^{o}$C to 60.3$^{o}$C?
6. Heat is transferred by the movement of currents within a fluid by a process called .....
7. Heat reaches to the surface of the earth through
8. The energy transfer between the hot fluid and cold fluids is brought about by their complete physical mixing in
9. The average kinetic energy of the molecules in the substance is directly proportional to
10. If the temperature of water is 0 degrees Celsius, what most likely is happening to the water?
11. The transfer of heat from one particle of matter to another within an object or between two objects through direct contact.
12. Which of the following is the fastest process of heat transfer?
13. It is the transfer of heat that does not rely upon any contact between the heat source and the heated object.
14. You add heat to an ice cube. What will happen next?
15. Which of the following thermometer contains mercury?
16. When liquids freeze to a solid, they ..... or get bigger.
17. Which is an example of heat being transferred by conduction?
18. Ml of coffee creamer at a temperature of 5.26 $^{o}$C is added to 428 ml of coffee at a temperature of 87.8 $^{o}$C. Use the following information and calculate the final temperature of the coffee and creamer together.density of water = 1.00 g/mldensity of creamer = 1.18 g/mldensity of coffee = 1.06 g/mlC$_{creamer}$ = 4.369 J/g *$^{o}$C C $_{coffee}$ = 4.202 J/g * $^{o}$C
19. What is something that will prevent blisters from friction?
20. Temperature of an iron rod is 330 K. Its temperature in centigrade
21. Sawing a piece of wood causes the end being sawed to become warm. In this case, heat is produced by .....
22. In which state of matter do particles have the most energy?
23. The northern part of India lies in the ..... zone.
24. Two metals of equal mass but different specific heats absorb the same amount of heat. Which metal undergoes the smaller change in temperature?
25. When two objects are rubbed together they produce heat. This is called .....
26. Hot air ..... while cool air .....
27. How much heat is needed to change 12 grams of ice at 0 $^\circ$C to 12 grams of water at 0$^\circ$C?
28. Convert the given temperature to Fahrenheit.32$^\circ$C.Do the calculations in your rough notes there is time ( 60 sec ) provided for this question
29. The compact heat exchangers are commonly used in
30. Mr. Salyer has a two-story house. In the winter, he uses his downstairs heating unit because the arm air
31. Graphite has a specific heat of 0.709 J/g$^\circ$C. If a 20 gram piece of graphite is cooled from 38$^\circ$C to 18$^\circ$C, how much energy was lost by the graphite?
32. Metals are ..... conductor of heat.
33. What is the primary method of heat transfer in liquids and gases?
34. In a sea breeze, the air is warmer above the .....
35. The normal temperature of human body is 37$^\circ$C.
36. A material that conducts heat poorly is called a
37. Which characteristic of wax makes it a good choice for making candles?
38. S.I. unit of temperature.
39. Rate of evaporation increases as?
40. Temperature is measured by a device called .....
41. What is the definition of CONDUCTION?
42. As the thermal energy of mater increases, its particles usually spread out, causing:
43. Which of the following shows heat loss?
44. How does heat flow?
45. When you heat materials for 10 minutes, how would you know which one is the BEST conductor?
46. In a swimming pool, water near the surface is slightly warmer. The warm water rises because of
47. Which of these is a good conductor
48. HEAT IS TRANSFERRED BY CONDUCTION IN
49. Materials that transfer energy easily.
50. Which of these would make the BEST insulator?
51. When two objects are in physical contact with each other
52. All objects radiate heat.
53. Which the following is a warming process
54. In convection the heat transfer occurs by movement of the fluid itself.
55. In coastal regions, when warm air from either land or sea rises, the cold air that replaces it creates a breeze. Which of the following is a correct description of such a breeze?
56. Something will melt faster in the .....
57. When heat is added to ice, the first change it goes through will be which of the following?
58. Give an example of conduction.
59. How does the setting of the Bronx contribute to the story in 'Heat'?
60. The flow of energy from an object at a higher temperature to an object at a lower temperature.
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