#### Term I Model Question Paper

9th Standard

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Science

Time : 01:00:00 Hrs
Total Marks : 100

Part A

15 x 1 = 15
1. Choose the correct one

(a)

mm< cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m> cm> km

2. 1 metric ton is equal to

(a)

100 quintals

(b)

10 quintals

(c)

1/10 quintals

(d)

1/100 quintals

3. The force responsible for drying of clothes in a washing machine is

(a)

Centripetal force

(b)

Centrifugal force

(c)

Gravitational force

(d)

Electro static force

4. Force involved in uniform circular motion is given by _______________

(a)

f = mv2/r

(b)

f = mvr

(c)

f= mr2/v

(d)

f = v2/r

5. _________ is used as reflectors in torchligh

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

6. A real and enlarged image can be obtained by using a

(a)

convex mirror

(b)

plane mirror

(c)

concave mirror

7. The physical state of water at 373 K is

(a)

Solid

(b)

liquid

(c)

vapour

(d)

plasma

8. The constituents that form a mixture are also called

(a)

Elements

(b)

Compounds

(c)

Alloys

(d)

Components

9. Among the following the odd pair is

(a)

8O18, 17cl37

(b)

18Ar40,7N14

(c)

14Si30, 15pd31

(d)

24cr54, 19K39

10. The term nucleons refer to

(a)

Protons and electrons

(b)

only Neutrons

(c)

electrons and neutrons

(d)

Protons and neutrons

11. The tropic movement that helps the climbing vines to find a suitable support is ________.

(a)

phototropism

(b)

geotropism

(c)

thigmotropism

(d)

chemotropism

12. The non-directional movement of a plant part in response to temperature is called ________.

(a)

thermotropism

(b)

Thermonasty

(c)

chemotropism

(d)

thigmonasty

13. During ecdysis which of the following is shed off

(a)

Chitin

(b)

Mantle

(c)

Scales

(d)

Operculum

14. The nutrient required in trace amounts to accomplish various body functions is _______________

(a)

Carbohydrate

(b)

Protein

(c)

Vitamin

(d)

Fat

15. Data processing involves________ steps

(a)

seven

(b)

four

(c)

six

(d)

eight

16. Part B

10 x 1 = 10
17. 1 kg of rice is weighed by ______

()

beam balance

18. Speed is a ____________ quantity whereas velocity is a ____________ quantity

()

scalar, vector

19. All distances parallel to the principal axis are measured from the ____________ of the mirror

()

pole

20. In petroleum refining, the method of separation used is _______

()

Fractional distillation

21. Total Number of electrons that can be accommodated in an orbit is given by-------

()

2n2

22. The shoot system grows upward in response to ___________

()

Light

23. Hydrotropism : Response towards water Phototropism : ___________

()

24. The raw materials for photosynthesis are _________ and _______.

()

CO2, H20 and Chlorophyll & Light

25. The binomial name of our National Bird is ______________.

()

Pavo cristatus

26. Dehydration is based on the principle of removal of _______________.

()

water/moisture

27. Part C

10 x 1 = 10
28. Constant retardation

29. (1)

30. Used in hairpin bends in mountains

31. (2)

Positive phototropism.

32. Mirage

33. (3)

total internal reflection

34. Charge of proton

35. (4)

concave mirror

36. Shoots growing towards the light

37. (5)

38. Roots growing downwards away from light

39. (6)

convex mirror

40. Iodine

41. (7)

Positive Phototropism

42. Text, number

43. (8)

Goitre

44. Ratio of height of image to height of object.

45. (9)

Information

46. Motion of a body covering equal distances in equal interval of time

47. (10)

1.6 x 10-19C

Part D

10 x 1 = 10
48. In everyday life, we use the term weight instead of mass.

(a) True
(b) False
49. A physical balance is more sensitive than a beam balance as it can accurately measure even a very small mass, even milligram

(a) True
(b) False
50. The velocity – time graph of a particle falling freely under gravity would be straight line parallel to the x axis

(a) True
(b) False
51. The convex mirror always produces a virtual, diminished and erect image of the object.

(a) True
(b) False
52. Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.

(a) True
(b) False
53. Electrons have negligible mass and charge.

(a) True
(b) False
54. Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.

(a) True
(b) False
55. Bipinnaria is the larva of Mollusca

(a) True
(b) False
56. Wings of birds are the modified forelimbs

(a) True
(b) False
57. Vitamin C is a water soluble Vitamin

(a) True
(b) False
58. Part E

6 x 2 = 12
59. Mention the differences between stomatal and lenticular transpiration

60. Give an example for the movement plant part which is very quick and can be observed easily

61. What is the full form of SI system?

62. Convert : 300 K into Celsius scale,

63. Name the spherical mirror(s) that has/have
i) Virtual principal focus
ii) Real principal focus

64. A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?

65. Part F

6 x 3 = 18
66. Write the need of a standard unit

67. The speed of a particle is constant. Will it have acceleration? Justify with an example.

68. State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

69. How is the reproductive characters of mammals different from those of Aves?

70. Explain any two methods of food preservation.

71. Differentiate data and information.

72. Part G

5 x 5 = 25
73. A train travelling at a speed of 90 kmph. Brakes are applied so as to produce a uniform acceleration of ‒0.5 ms-2. Find how far the train will go before it is brought to rest?

74. Light enters from air into a glass plate having refractive index 1.5. What is the speed of light in glass?(Speed of light in vacuum is 3 × 108 ms-1)

75. Calculate the mass of a proton, given its charge = + 1.60 $\times$10−19 C charge / mass = 9.58 $\times$ 107 C kg-1

76. How are vitamins useful to us? Tabulate the sources, deficiency diseases and symptoms of fat soluble vitamins

77. List out the generations of computer