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Important Instructions for the School Principal

(Not to be printed with the question paper)

1) This question paper is strictly meant for use in school based SA-II, March-2012

only. This question paper is not to be used for any other purpose except mentioned above under any circumstances.

2) The intellectual material contained in the question paper is the exclusive property of Central Board of Secondary Education and no one including the user school is allowed to publish, print or convey (by any means) to any person not authorised by the board in this regard.

3) The School Principal is responsible for the safe custody of the question paper or any other material sent by the Central Board of Secondary Education in connection with school based SA-II, March-2012, in any form including the print-outs, compact-disc or any other electronic form.

4) Any violation of the terms and conditions mentioned above may result in the action criminal or civil under the applicable laws/byelaws against the offenders/defaulters.

Note: Please ensure that these instructions are not printed with the

question paper being administered to the examinees.

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SUMMATIVE ASSESSMENT – II, 2012

II, 2012

SCIENCE /

Class – IX / IX

Time allowed : 3 hours Maximum Marks : 90

3 90

General Instructions :

(i) The question paper comprises of two Sections, A and B. You are to attempt both the

sections.

(ii) All questions are compulsory.

(iii) There is no overall choice. However, internal choice has been provided in all the five

questions of five marks category. Only one option in such questions is to be attempted.

(iv) All questions of Section-A and all questions of Section-B are to be attempted separately.

(v) Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in

one word or in one sentence.

(vi) Question numbers 4 to 7 in Section-A are two marks questions. These are to be answered in

about 30 words each.

(vii) Question numbers 8 to 19 in Section-A are three marks questions. These are to be answered

in about 50 words each.

(viii) Question numbers 20 to 24 in Section-A are five marks questions. These are to be answered

in about 70 words each.

(ix) Question numbers 25 to 42 in Section-B are multiple choice questions based on practical

skills. Each question is a one mark question. You are to select one most appropriate

response out of the four provided to you.

(i)

(ii)

(iii)

(iv)

(v) 1 3

(vi) 4 7 30

(vii) 8 19 50

(viii) 20 24 70

(ix) 25 42

47005

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SECTION-A /

1. Define the atomic mass unit.

1

2. Mention any one characteristic feature of saprophytes.

1

3. What are CFCs ?

CFCs

1

4. Is the given figure of angiosperm plant a dicot or monocot ? Differentiate between dicot

and monocot on the basis of venation in leaf and number. of cotyledons in the seed.

2

5. List any four essential factors that must be taken care of by an individual for keeping good

health.

2

6. The cutting tools have sharp edges ? Give reason.

2

7. Given below are a few situations study them and state in which of the given cases work is

said to be done. Give reason for your answer. (i) A person pushing hard a huge rock but the rock does not move.

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(ii) A bullock pulling a cart upto 1 km on road. (iii) A girl pulling a trolley for about 2 m distance. (iv) A person standing with a heavy bag on his head.

(i)

(ii) 1 km

(iii) 2 m

(iv)

8. (a) Explain the difference between an atom and an ion. Write the electronic

configuration of atom and positive ion of 23

11X .

(b) Write the compound formed when ion of element „X‟ combines with carbonate ion.

(a) 23

11X

(b) „X‟

3

9. (a) State Bohr‟s postulates about the model of an atom

(b) Write the electronic configuration for an atom whose atomic number is 11 and mass number 23, show it by drawing a figure.

(a)

(b) 11 23

3

10. (1) The average atomic mass of a sample of an element x is 35.5u. What are the

percentages of isotopes 3717

X and 3517

X in the sample.

(2) Write any two applications of isotopes.

(1) X 35.5 u 3717

X

3517

X

(2)

3

11. Write two characteristic features of phylum to which Ascaris belongs. Name the parasitic 3

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worm causing elephantiasis.

12. (a) Draw a well labeled diagram of paramecium.

(b) Name the kingdom to which it belongs.

(a)

(b)

3

13. Name diseases which are caused by – (two for each)

(i) virus (ii) bacteria (iii) protozoa

(i) (ii) (iii)

3

14. (a) Define the term „relative density‟ of a substance.

(b) Relative density of silver is 10.8, the density of water is 103 kg/m3. What will be the density of silver in S.I. units ?

(a)

(b) 10.8 103 kg/m3

S.I.

3

15. State Law of conservation of energy and express it in the form of an equation for a body of

mass „m‟ falling from a point A at height „h‟ above the ground at (i) A (ii) C at a height h from ground (iii) B.

„h‟ A m

(i) A

(ii) h C

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(iii) B

16. A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step is 15 cm,

find his power. Take g10ms2.

50 kg 45 9 s 15 cm

g10ms2

3

17. „A sound wave with frequency higher than 20 kHz is not audible for human ear‟.

Answer the following in respect of this statement. (i) What is the term used for such a sound ? (ii) Name two organisms producing sound in this range. (iii) Write an application of such a wave.

20 kHz

(i)

(ii)

(iii)

3

18. Atmosphere is essential for life why “. List three reasons in support of this statement.

3

19. (i) Write the various components of soil.

(ii) “Fertilizers and pesticides lead to soil pollution”. This statement. List two reasons

to justify.

(i)

(ii)

3

20. (a) Write the chemical formulae of :

(i) Calcium Sulphate (ii) Magnesium Oxide (iii) Potassium Chloride (iv) Sodium Hydroxide (v) Calcium Oxide (vi) Hydrogen Sulphide. (b) Define Avogadro number and give its value. Calculate the number of atoms in 52 g of Helium. (atomic mass of Helium is 44)

(a)

(i)

(ii)

(iii)

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(iv)

(v)

(vi)

(b) 52 g

( 4u )

OR /

(a) Convert into mole (i) 12 g of oxygen gas (ii) 22 g of carbondioxide (b) Write the names of the compounds represented by the following formulae : (i) NaBr

(ii) Al2O3

(iii) ZnNO3

(iv) HCl (v) NaCl

(vi) CaCO3

(a)

(i) 12 g

(ii) 22 g

(b)

(i) NaBr

(ii) Al2O3

(iii) ZnNO3

(iv) HCl (v) NaCl

(vi) CaCO3

21. State five characteristic features of vertebrate animals. Name the five classes in which

vertebrates are grouped giving an example of each class.

5

OR/

To which class of animalia does the housefly belong ? Mention any three characteristic features of this class of animals. Give two other examples of this class of animals.

22. (a) (i) Define work in terms of science and explain it mathematically. Write its

SI units. (ii) A pair of bullocks exerts a force of 140 N on a plough. The field being

ploughed is 15 m long. How much work is done in ploughing the length of the field ?

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(b) Calculate the energy possessed by an object of mass 15 kg moving with uniform

velocity of 4 ms1.

(a) (i)

SI

(ii) 140 N

15 m

(b) 4 / 15

OR/

(a) Explain the energy transformation in the following examples (i) An arrow thrown by stretching a bow. (ii) A toy car moves when its key is wound. (iii) A slinky vibrates when compressed and then released. (b) Calculate the work done when a force of 7N is applied on an object and

displacement of 8 m takes place in the direction of the force.

(a)

(i)

(ii)

(iii)

(b) 7N 8 m

23. (a) Define the following terms and give their SI unit.

(i) Time Period (ii) Wavelength (b) A source of sound emits a wave of wavelength 2.9m. Find the frequency of wave

emitted by the source. Velocity of sound wave is 340ms-1 ?

(a) SI

(i) (ii)

(b) 2.9 m

340 ms-1

5

OR/

(a) Does sound follow the same laws of reflection as light does ? Explain. (b) Give two practical applications of reflection of sound waves.

(a)

(b)

24. (a) What is the green house effect ? Name the atmospheric gas, which lead to it and

what is impact of it on global climate ?

(b) Give a schematic representation of the Water cycle, Name the main processes

involved in it.

(a)

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(b)

OR /

(a) The atmosphere acts as a blanket. How ?

(b) Name the two forms of oxygen found in the atmosphere.

(c) Write the biotic and abiotic components of our environment.

(a)

(b)

(c)

SECTION - B /

25. Barium chloride solution appears :

(a) blue (b) blue – green

(c) yellow (d) colourless

(a) (b)

(c) (d)

1

26. Which of the following is NOT required while conducting the experiment to verify law of

conservation of mass ?

(a) solution of barium chloride

(b) solution of sodium sulphate

(c) solution of sodium chloride

(d) balance for weighing

(a)

(b)

(c)

(d)

1

27. In the given figure, a student wants to label spiracle in cockroach. Select the label that

shows it : 1

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(a) A (b) B (c) C (d) D

ददए गए आरेख में एक विद्याथी श्वासरंध्र (स्ऩाइरैकऱ) नामेांदकत करना चाहता है। इसको दर्ााने िाऱा नामेांकन चुननए :

(a) A (b) B (c) C (d) D

28. Which one of the following represents the non-flowering seeded plants ?

(a) Pteridophyta (b) Gymnosperms

(c) Angiosperms (d) Bryophytes

(a) (b)

(c) (d)

1

29. Burrowing adaptation in earthworm is because of the presence of :

(a) bristles/setae (b) body wall muscles

(c) cylindrical body (d) all the above

कंचुए में विऱ खोदने की अनकूुऱता जिसकी उऩजस्थनत के कारण होती है िह है : (a) र्कू िैसे कड़े िाऱ / नसटी (b) देह ऩेनर्या ं(c) िेऱनाकार देह (d) ऊऩर ददए गए सभी

1

30. To which group does Spirogyra belong ?

(a) Thallophyta (b) Fungi (c) Bryophyta (d) pteridophyta

(a) (b) (c) (d)

1

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31. Four students A, B, C and D are observing the venation of leaves and petals of flowers of a

pea plant. They reported their observations that pea plant has :

(A) reticulate venation and trimerous flower

(B) reticulate venation and pentamerous flower

(C) Parallel venation and trimerous flower

(D) Parallel venation and pentamerous flower

The student whose observation is correct is :

(a) (A) (b) (B) (c) (C) (d) (D)

A, B, C D

(A)

(B)

(C)

(D)

(a) (A) (b) (B) (c) (C) (d) (D)

1

32. Four students A, B, C and D are observing the feeding habits of all the developmental

stages in the life cycle of mosquito. Their observation that the stage in which it feeds on animal blood is :-

(A) pupa

(B) egg

(C) larva

(D) adult

The correct observation is of student :-

(a) A (b) B (c) C (d) D

A, B, C D

(A)

(B)

(C)

(D)

(a) A (b) B (c) C (d) D

1

33. A measuring cylinder which measures in cm3 shown below is used to measure the level of

water before and after immersing a solid in it. The volume of the given solid is : 1

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(a) 2.2 cm3 (b) 2.4 cm3 (c) 2.8 cm3 (d) 3.0 cm3

cm3

(a) 2.2 cm3 (b) 2.4 cm3 (c) 2.8 cm3 (d) 3.0 cm3

34. In an experiment to determine the density of a given solid, a student made the following

observations : Mass of solid = 120 g Initial reading of water level in measuring cylinder = 45 mL Reading of water level in measuring cylinder when the solid is completely immersed in water = 69 mL The density of the solid based on these observations is : (a) 2.88 kg/m3 (b) 64 g/mL (c) 5 g/mL (d) 0.05 kg/m3

= 120 g

= 45 mL

= 69 mL

(a) 2.88 kg/m3 (b) 64 g/mL (c) 5 g/mL (d) 0.05 kg/m3

1

35. Using a spring balance, a given solid is first weighed in the air. It is then weighed by

immersing fully in water in each of the three vessels containing water as shown. The apparent weight of the solid will be :

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(a) least in A (b) least in B (c) least in C (d) equal in all

(a) A (b) B

(c) C (d)

36. When a solid body is fully immersed in a liquid, the apparent loss in its weight is :

(a) equal to the weight of the liquid displaced. (b) more than the weight of the liquid displaced. (c) less than the weight of the liquid displaced. (d) depends upon the manner in which the body is immersed in the liquid.

(a)

(b)

(c)

(d)

1

37. An iron cuboid of dimensions 100 cm 50 cm 10 cm when placed on a bed of sand

will depress the sand bed the least, when it is made to lie on the face having dimensions :

(a) 100 cm 10 cm

(b) 100 cm 50 cm

(c) 50 cm 10 cm

(d) the pressure will be same for all the surfaces

100 cm 50 cm 10 cm विमेाओ ंिाऱे ऱोहे के घनाभ को ढीऱी रेत ऩर रखने ऩर सिसे कमे द्वाि ति ऩड़ेगा िि उसकी ननम्न विमेाओ ंिाऱी सतह को रेत ऩर रखा िाएगा :

(a) 100 cm 10 cm

(b) 100 cm 50 cm

(c) 50 cm 10 cm

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(d) सभी सतहं से एक समेान दाि ऩड़ेगा।

38. To observe and compare the pressure exerted by solid iron cuboid in its upright

position, student A placed the iron cuboid gently on the loose sand while B placed it on the surface of table top. Who will observe the exerted pressure by the cuboid easily ?

(a) A (b) B

(c) Both A and B (d) Neither A nor B

एक विद्याथी A ने ऱोहे के घनाभ को धीरे से ढीऱी रेत ऩर रखा तथा दसूरे विद्याथी B ने मेेि ऩर रखा। कौनसा विद्याथी घनाभ द्वारा ऱगाए गए दाि को आसानी से पे्रजऺत करेगा ?

(a) A (b) B

(c) दोनं A तथा B (d) न A न B

1

39. When the sound wave is allowed to fall normally on the reflecting surface, the angle at

which the intensity of sound will be maximum is :

(a) 0 (b) 60 (c) 30 (d) 90

(a) 0 (b) 60 (c) 30 (d) 90

1

40. In an experiment to verify the laws of reflection of sound we need :

(a) a polished and smooth surface

(b) hard surface only

(c) a polished and rough surface

(d) both (b) and (c) only

(a)

(b)

(c)

(d) (b) (c)

1

41. Vishal produces a pulse in a stretched slinky by gently giving a jerk to its rings at one end

which of the following statement will be wrong to describe the pulse _ (a) it is a longitudinal pulse (b) it is a transverse pulse (c) it moves in the form of compression and rarefaction (d) the rings vibrate in the direction of pulse.

(a)

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(b)

(c)

(d)

42. The stop-watch used by a student to measure velocity of a pulse in a slinky was of least

count 0.1sec. He stops the stop-watch when a pulse has made 3 journeys from one end to the other of the slinky. He finds seconds-hand to be at 47th division. Which of the following would be correct time noted by him. (a) 47 sec (b) 4.7 s. (c) 0.47s. (d) 4.07s.

0.1s

47

(a) 47 sec (b) 4.7 s. (c) 0.47s. (d) 4.07s.

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