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Class 7 Science Chapter 3 Heat Quiz 6 (60 MCQs)

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1. Flow of heat by conduction is generally observed in case of
2. At A Campsite There Are Tents Of Three Shades. One Made With Black Fabric And Other Is White Fabric And One Is Black And White Combination. Which Will You Prefer For Resting On A Hot Summer Afternoon?
3. Air prevents ..... from our body to the .....
4. Bill stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface. Which process causes this difference in temperature?
5. In case of ..... the cool air moves from the land toward sea
6. Light coloured clothes absorb heat faster.
7. What is a reliable measure of the hotness of an object .....
8. The temperature scale on which water freezes at 0 and boils at 100
9. In class we put some candles on a medal spoon. We help one end of the spoon over a flame and watched the heat travel through the spoon and melt the candles on the other side. What kind of heat transfer was this?
10. Heat that is transferred because of touching is called .....
11. A puddle on a sidewalk would MOST LIKELY feel warm because .....
12. General effect of Heat is/are:
13. A device used to control the temperature
14. The flow of heat transfer creates a circular motion known as a convection current.
15. What is the unit in which temperature is commonly measured?
16. About 30% of the solar energy that reaches the atmosphere is reflected back into space. About 20% is absorbed by the air. What percentage reaches earth's surface?
17. It is the transfer of heat between substances that are in direct contact with each other.
18. Lisa has a bottle of water. How can she increase the thermal energy of the water?
19. The Law of Conservation of Energy states:
20. This type of heat transfer can be felt without touching the source, i.e. heat from a fire.
21. One litre of water at 30 $^\circ$C is mixed with one litre of water at 50$^\circ$C. The Temperature of the mixture will be
22. To change from a solid to a liquid
23. What is the primary method of heat transfer in a vacuum?
24. SPECIFIC HEAT CAPACITY MEASURES .....
25. Convection currents occur:
26. A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0$^\circ$C. If iron has a specific heat of 0.10 J/g$^\circ$C, what is the mass of the iron sample?
27. How does Danny Walker show determination in the book?
28. What is the normal temperature of human body?
29. THERE ARE TWO OBJECTS TOUCHING TO EACH OTHER.THE OBJECT A HAS TEMPERATURE 70$^{O }$C AND OBJECT B HAS TEMPERATURE 46$^{O}$C.THERE WILL TRANSFER OF HEAT FROM
30. Why do you want to live in a home with good insulation during the cold winter months?
31. What is temperature measured in?
32. A student is investigating friction as a source of heat energy using a toy train and train tracks. Which question should the student try to answer with her investigation?
33. You heat up 2 pans of water; one has 100 mL in it, and the other has 1000 mL. Which one heats up the fastest?
34. The sum of kinetic and potential energy is known as internal energy. The flow of internal energy is called .....
35. Which of the following is an example of convection?
36. Which scale is used to measure absolute zero temperature?
37. Where do we get the greatest amount of heat energy from?
38. Can convection currents occur in a solid?
39. The transfer of heat which doesnot required any medium is called
40. Convert the given temperature to celsius.150$^\circ$F.Do the calculations in your rough notes there is time ( 60 sec ) provided for this question.
41. Which character in 'Heat' is known for their exceptional pitching skills?
42. An ideal gas undergoing isothermal expansion means
43. Latent heat does not raise (or increase) the .....
44. Tires rubbing on the street and making smoke comes from which source of heat?
45. Which is NOT a good insulator?
46. The ..... of a liquid is the quantity of heat in joules required to convert 1 kilogram of the liquid (at its boiling point) to vapour or gas, without any change in temperature.
47. The molecules in a solid vibrates ..... when heated.
48. What are the two scales used to measure temperature?
49. Usually, the flow arrangement of two fluids in compact heat exchangers is
50. Insulation is used in the walls of a building to .....
51. In which of the following modes of heat transfer, do the molecules travel from the hotter part of the body to the colder part?
52. Heat moves in 3 ways:conduction, convection, and radiation.
53. What do you call an organism that has adapted to living in very high temperatures (heat), such as bacteria or algae.
54. The air near the ceiling in a room is warmer that the air near the floor.
55. Water boils in a kettle.
56. If you place a black and white cup in the sun, the black cup gets hotter because
57. TRUE OR FALSEThe average normal temperature of the human body is 98.6$^\circ$F.
58. A steak being heated when in touches a hot pan
59. Heat is transferred from one particle of matter to another without the movement of matter itself is called
60. The process by which heat comes from the sun to the earth is
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