Heat Online Test 6th Science Lesson 7 Questions in English

1. Which of the following are the sources of heat?
1. Sun
2. Combustion
3. Friction

2. Which of the following statement is correct?
1. We cannot generate heat by rubbing two surfaces of some substances.
2. In the past people used to rub two stones together to light fire.

3. Which of the following is correct?
1. When electric current flows through a conductor, heat energy is produced.
2. The water heater, iron box, electric kettle etc., work on the principle of electromagnetic induction.

4. Which of the following is the property of heat?
1. Heat is not a matter.
2. It does occupy space
3. It has no weight

5. Which of the following statement is correct?
1. Molecules in objects are constantly vibrating or moving inside objects.
2. When we heat the object this vibration and movement of molecules increases and temperature of the object also increases.

6. Which of the following is the unit of heat?
1. Joule
2. Calorie
3. Farad

7. What is the SI unit of heat?

8. Heat is the total_____ energy of constituent particles of objects.

9.______ are used to measure temperature accurately and quantitatively

10. The measurement of warmness or coldness of a substance is known as its______

11. What is the SI unit of Temperature?

12. Which of the following are the units of temperature?
1. Fahrenheit
2. Celsius
3. Kelvin

13. Which of the following statement is correct?
1. SI unit of temperature is Fahrenheit
2. Temperature determines the direction of flow of heat when two bodies are not in contact.

14. Water boils at____ o C.

15. At what temperature freezes?

16. Our normal body temperature is______

17. Which of the following statement is correct?
1. The minus sign (–) is used when the temperature falls below the freezing point of water, which is 0o C.
2. The thermometer should not touch the vessel in which the water is being heated. Otherwise the thermometer will be broken at high temperature.

18. Our body feels cool if the air temperature is around____ degree Celsius.

19. Which of the following statement is incorrect?
1. Heat and temperature are the same thing
2. Heat measures the total Kinetic Energy of the molecules in the substance.

20. ________ is related to how fast the atoms or molecules move or vibrate within the substance

21.______ measures the average kinetic energy of molecules.

22. Which of the following statement is correct?
1. Heat not only depends on the temperature of the substance but also depends on how many molecules are there in the object
2. Temperature is related to how fast the atoms or molecules move or vibrate within the substance.

23. Total heat is measured by_____

24. Water ‘flows’ when there is a difference in the______ in different places

25. Which of the following statement is incorrect?
1. Water ‘flows’ when there is a difference in the ‘levels’ of water in different places. It does not matter if there is more water in one place or another.
2. Water from a puddle can flow into a reservoir or the other way around.

26. Which of the following statement is correct?
1. The ‘temperature’ of an object is like the water level – it determines the direction in which ‘heat’ will flow.
2. Heat energy flows from higher temperature to lower temperature.

27. Which of the following statement is incorrect?
1. Two objects are said to be in thermal contact if they can exchange heat energy. T
2. Thermal equilibrium exists when two objects in thermal contact no longer affect each other’s temperature.

28. Most substances____ when heated

29. Substance_____ when Cooled

30. Which of the following is directly related to temperature change?
1. change in length
2. change in area
3. change in volume

31. The expansion of a substance on heating is called, the thermal____ of that substance.

32. When solid is heated it expands in______

33. The expansion in length is called_____ expansion

34. The expansion in volume is called____ expansion.

35. Why is a small gap left between two lengths of railway lines?

36. The diameter of the iron ring is___ that of the wooden wheel.

37. Which of the following statement is correct?
1. The iron ring is, therefore, first heated to a higher temperature so that it expands in size and the hot ring is then easily slipped over to the rim of the wooden wheel.
2. Cold water is now poured on the iron ring so that it contracts in size and holds the wooden wheel tightly

38. Rivets are used to join____ steel plates together.

39. Which of the following is correct about Rivetting?
1. Hot rivet is driven through the hole in the plates.
2. One end of the rivet is hammered to form a new rivet head. When cooled, the rivet will contract and hold the two plates tightly together.

40. Glass is a____conductor of heat.

41. When hot liquid is poured into the tumbler, the inner surface of the tumbler becomes hot
and_____

42. Which of the following is incorrect?
1. When hot liquid is poured into the tumbler, the inner surface of the tumbler becomes hot and expands while the outer surface remains at the room temperature and does not expand
2. Due to this unequal expansion, the tumbler cracks.

43. On cold days Electric wires between electric posts_____

44. In Summer the Electric wires between electric posts_____

45. Glassware used in kitchen and laboratory are generally made up of_______

46. Which of the following do not expand much on being heated?

47.________ calorie heat energy is needed to raise the temperature of the water from 30o C to 31o C.

48. Total Kinetic Energy of molecules: Heat :: Average Kinetic Energy : __________