#### Heat Model Question Paper

6th Standard

Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 40
3 x 1 = 3
1. When an object is heated, the molecules that make up the object

(a)

begin to move faster

(b)

lose energy

(c)

become heavier

(d)

become lighter

2. The unit of heat is

(a)

newton

(b)

joule

(c)

volt

(d)

celsius

3. An iron ball at 50°C is dropped in a mug containing water at 50o C. The heat will

(a)

flow from iron ball to water.

(b)

not flow from iron ball to water or from water to iron ball.

(c)

flow from water to iron ball.

(d)

increase the temperature of both.

4. 3 x 1 = 3
5. Heat flows from a ____________ body to a ____________ body.

()

heater

6. The SI unit of temperature is ___________________.

()

kelvin

7. Two bodies are said to be in the state of thermal______________ if there is no transfer of heat taking place.

()

equilibrium

8. 3 x 1 = 3
9. Heat is a kind of energy that flows from a hot body to a cold body.

(a) True
(b) False
10. Thermal expansion is always a nuisance.

(a) True
(b) False
11. The unit of heat and temperature are the same.

(a) True
(b) False
12. 5 x 1 = 5
13. Heat

14. (1)

No heat flow

15. Temperature

16. (2)

joule

17. Thermal Equilibrium

18. (3)

100oC

19. Ice cube

20. (4)

0oC

21. Boiling water

22. (5)

kelvin

3 x 2 = 6
23. Heat : Joule :: Temperature : _____________

24. ice cube : 0oC :: Boiling water :_____________.

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

26. 2 x 2 = 4
27. What is temperature?

28. What do you understand by thermal equilibrium?

29. 2 x 3 = 6
30. What difference do you think heating the solid will make in their molecules ?

31. Distinguish between heat and temperature.

32. 2 x 5 = 10
33. Explain thermal expansion with suitable examples.

34. Suppose your normal body temperature were lower than what it is. How would the sensation of hot and cold change?