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Class 7 Science Chapter 3 Heat Quiz 26 (25 MCQs)

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1. If the temperature of water is 0 degrees Celsius, what most likely is happening to the water?
2. The transfer of heat from one particle of matter to another within an object or between two objects through direct contact.
3. Which of the following is the fastest process of heat transfer?
4. It is the transfer of heat that does not rely upon any contact between the heat source and the heated object.
5. You add heat to an ice cube. What will happen next?
6. Which of the following thermometer contains mercury?
7. When liquids freeze to a solid, they ..... or get bigger.
8. Which is an example of heat being transferred by conduction?
9. 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
10. What is something that will prevent blisters from friction?
11. Joule unit is
12. Temperature of an iron rod is 330 K. Its temperature in centigrade
13. Sawing a piece of wood causes the end being sawed to become warm. In this case, heat is produced by .....
14. In which state of matter do particles have the most energy?
15. The northern part of India lies in the ..... zone.
16. Two metals of equal mass but different specific heats absorb the same amount of heat. Which metal undergoes the smaller change in temperature?
17. When two objects are rubbed together they produce heat. This is called .....
18. Hot air ..... while cool air .....
19. How much heat is needed to change 12 grams of ice at 0 $^\circ$C to 12 grams of water at 0$^\circ$C?
20. 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
21. The compact heat exchangers are commonly used in
22. Mr. Salyer has a two-story house. In the winter, he uses his downstairs heating unit because the arm air
23. 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?
24. Metals are ..... conductor of heat.
25. What is the primary method of heat transfer in liquids and gases?
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