Page 1 of 16 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.
Transcript
Page 1 of 16
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.
Page 2 of 16
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
SC-1010
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SECTION-A /
1. An element ‘X’ forms an oxide with formula X2O3. State the valency of ‘X’ and write the formula of its chloride
‘X’ X2O3 X
1
2. State the phylum to which antedon (feather star) and asterias (Starfish) belong.
1
3. List two biotic components of biosphere.
1
4. Distinguish between Bryophyta and Thallophyta stating two examples of each.
2
5. List four diseases for which vaccines have been developed.
2
6. What is meant by buoyancy ? Draw a diagram to show two forces acting on an object floating half immersed in a liquid.
2
7. How is work done by a force measured ? A porter lifts a luggage of 20 kg from the ground and puts it on his head 1.7 m above the ground. Find the work done by the porter on the luggage. (g10 m/s2)
20 kg 1.7 m
2
8. Define mole. How many grams of sodium will have the same number of atoms as 6 grams of magnesium ? (Given Na23u, Mg24 u)
6 g
(Na23u, Mg24 u)
3
9. You are given an elements
16
8X . Find out
(a) Number of protons, electrons and neutrons in ‘X’ (b) Valency of ‘X’ (c) Write the chemical formula of the compound formed when ‘X’ react with
(i) hydrogen, (ii) carbon
16
8X
(a) X
(b) X
X (i) (ii)
3
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10. (a) From Rutherford’s - particle scattering experiment give the experimental evidence for deriving the conclusion that
(i) most of the space inside the atom is empty. (ii) the nucleus of an atom is positively charged (b) An elements has mass number 35 and atomic number 17 find (i) the number of neutron in the element, and (ii) the number of electrons in the outermost shell.
(a) -
(i)
(ii)
(b) 35 17
(i)
(ii)
3
11. Draw diagram of hydra and label the following parts : Tentacles, Stinging cells, Gastrovascular Cavity, Epidermis.
3
12. State appropriate terms for the following : (i) Animals that are able to maintain a certain body temperature over a wide
range of temperature in the environment (ii) Plants which bear naked seeds (iii) Animals which have pseudocoelom.
(i)
(ii)
(iii)
3
13. “It is difficult to make antiviral medicines than making antibiotics “Justify this statement.
3
14. Distinguish between density and relative density of a substance. The relative density
of silver is 10.8. If the density of water is 103 kg/m3 find the density of silver.
10.8
103 kg/m3
3
15. Define work. How is work measured ? When is work done by a force said to be negative ?
3
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16. A force is applied on a car of mass 1500 kg, so that its speed increases from 54 km/h to 72 km/h. Find the workdone by the force on the car.
1500 kg 54 km/h 72 km/h
3
17. What is an echo ? When can we distinctly hear the echo of a sharp sound ? Why can not we hear an echo in a small halls ?
3
18. List three functions performed by the atmosphere to act as a blanket.
3
19. State briefly three harmful effects of burning of fossil fuels.
3
20. (a) When 3 g of carbon is burnt in 8 g of oxygen 11 g of carbon dioxide is produced. Find the mass of carbon dioxide produced on burning 3 g of carbon in 50 g of oxygen. Justify your answer by stating the law which governs your answer.
(b) State the postulate of Dalton’s atomic theory which can explain the above law.
(c) State the postulate of Dalton’s atomic theory which can explain the law of conservation of mass.
(a) 3 g 8 g 11 g 3g
50 g
(b)
(c)
5
OR/
(a) What is meant by atomicity of an element ? Give one example each of tetra atomic and poly atomic elements.
(b) What are poly atomic ions. List two examples. (c) Write the chemical formula of the following compounds (i) Copper nitrate (ii) Aluminum Chloride.
(a)
(b)
(c)
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(i) (ii)
21. (a) State two characteristic features of vertebrates : (b) State reasons for each of the following statements (i) Echidna and platypus lay eggs but considered as mammals. (ii) Forelimbs of birds are modified. (iii) Crocodiles have four chambered heart but are still reptiles.
(a)
(b)
(i)
(ii)
(iii)
5
OR/
(a) State two characteristic features of amphibians. (b) Identify the following organisms. (i) Cold blooded animals that lay eggs in water and have three chambered heart (ii) Spiny skinned organisms which have a peculiar water-drivern tube system that they use for moving around. (iii) Organisms which have an open circulatory system having blood filled coelomic cavity.
(a)
(b)
(i)
(ii)
(iii)
22. (a) Define average power. Calculate the total energy consumed in the month of November in a household in which four devices of power 500 W each are used daily for 10 hours.
(b) A freely falling object eventually stops on reaching the ground. What happens to its energy ?
(a)
500 W 10
(b)
5
OR/
(a) What is meant by mechanical energy ? State its two forms. State the law of conservation of energy. Give an example in which we observe a continues change of one form of energy into another and vice a versa.
(b) Calculate the amount of work required to stop a car of 1000 kg moving with a speed of 72 km/h.
(a)
(b) 72 km/h 1000 kg
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23. (a) List in tabular form two distinguishing features between longitudinal waves and transverse waves. Give an example of each.
(b) State and define two characteristics associated with sound waves
(a)
(b)
5
OR/
(a) What does SONAR stands for ? Explain its working stating one practical application.
(b) A ship sends out ultra sound that returns from the seabed and is detected after 4s. If the speed of ultra sound through sea water is 1550 m/s, find the distance of the seabed from the ship.
(a)
(b) 4s
1550 m/s
24. (a) List three major physical processes in the water cycle in nature. (b) Draw a labelled diagram of oxygen cycle in nature.
(a)
(b)
5
OR/
(a) Draw a diagram of Nitrogen cycle in nature. (b) State two consequence of global warming.
(a)
(b)
5
SECTION - B /
25. To verify the law of conservation of mass in a chemical reaction a student takes a known amount of solution of BaCl2 in a small test tube which is hanged in a sealed conical flask, containing Na2SO4 solution. The flask is slightly tilted so that the two solutions get mixed with each other and a chemical reaction occurs. In this experiment it is observer that : (a) Mass of BaCl2 Mass of Na2SO4 (b) Mass of (BaCl2Na2SO4)Mass of (BaSO4NaCl) (c) Mass of (BaCl2NaCl) Mass of (BaSO4Na2SO4) (d) Mass of Na2SO4 Mass of BaSO4
BaCl2
Na2SO4
(a) BaCl2 Na2SO4
(b) (BaCl2Na2SO4) (BaSO4NaCl)
(c) (BaCl2NaCl) (BaSO4Na2SO4)
1
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(d) Na2SO4 BaSO4
26. To verify the law of conservation of mass in a chemical reaction we generally use 5%
solutions of two given Salts. 5% Salt Solution means. (a) 5 g Salt is to be dissolved in 100 mL of water (b) 5 g Salt is to be dissolved in 100 g of water (c) 5 g Salt is dissolved in 95 g of water (d) 5 g Salt is dissolved in 105 g of the solution
5%
5%
(a) 100 mL 5 g (b) 100 g 5 g
(c) 95 g 5 g (d) 105 g 5 g
1
27. Four organisms A,B,C and D are given below. On the basis of Common features
which two organisms would you place in the same phylum ?
(a) A and B (b) B and C (c) C and D (d) D and A
A, B, C D
1
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(a) A B (b) B C (c) C D (d) D A
28. In the given Diagram the structures marked A and B are
(a) gills and roots
(b) gills and stipe
(c) gills and rhizoids
(d) pileus and gills
A B
(a)
(b)
(c)
(d)
1
29. Study the diagram of an earthworm given below. The most characteristic feature of
this animal on the basis of which it has been placed in its phylum is
1
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(a) anus (b) Clitellium (c) annuli (d) peritonium
(a) (b) (c) (d)
30. The plants with well differentiated reproductive tissues that ultimately produce
seeds are called (a) thallophyta (b) Broyophyta (c) Pteridophyta (d) phanerogams
(a) (b)
(c) (d)
1
31. When you observe the roots and leaves of grass plants you find that they have
(a) Fibrous roots and leaves with reticulate venation 1
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(b) fibrous roots and leaves with parallel venation (c) tap roots and leaves with reticulate venation (d) tap roots and leaves with parallel venation
(a)
(b)
(c)
(d)
32. When you study the development stages in the life cycle of a mosquito, you find that
the stage in which this organism feeds on animal blood is (a) adult (b) larva (c) pupa (d) egg
(a) (b) (c) (d)
1
33. Study the position of the pointer of spring balance in two cases and determine the
weight of the body hanging on the hook of the spring balance :
(a) 30 gwt (b) 29.7 gwt (c) 27.0 gwt (d) 25.0 gwt
1
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(a) 30 gwt (b) 29.7 gwt (c) 27.0 gwt (d) 25.0 gwt
34. A Portion of a graduated cylinder filled with a liquid is shown in the diagram. The
least count of the cylinder and the volume of liquid filled in it respectively are
(a) 2 mL ; 98 mL (b) 2 mL ; 96 mL (c) 1 mL ; 93 mL (d) 1 mL ; 90.3 mL
1
Page 13 of 16
(a) 2 mL ; 98 mL (b) 2 mL ; 96 mL (c) 1 mL ; 93 mL (d) 1 mL ; 90.3 mL
35. A metallic solid of mass 176 g was immersed in a graduated cylinder containing
water. The initial and final readings of the water level are as shown in the diagram.
The density of the solid in g / cm3 is
(a) 17.6 (b) 8.8 (c) 8.0 (d) 7.8
176 g
g/cm3
(a) 17.6 (b) 8.8 (c) 8.0 (d) 7.8
1
36. A student measures weight of an iron cylinder first in air, then in a gradated cylinder
filled with water and finally in an overflow can filled with water upto its spout. If the weights of the iron cylinder in three cases are W1, W2 and W3 respectively he must observe that
37. To observe and compare the pressure exerted by the three faces of a cuboid on the
sand, if you have cuboids of same dimensions but of different materials, the best choice of material out of the following would be. (a) Iron cuboid and fine sand (b) Aluminum cuboid and fine sand (c) Iron cuboid and coarse sand (d) Wooden cuboid and coarse sand
(a)
(b)
(c)
(d)
1
38. A cuboid of mass 2.0 kg and dimensions 2 cm X 5 cm X 25 cm is placed on a table to
exert pressure on its surface. If the value of g10m/s2 the maximum and minimum pressures exerted by the cuboid respectively are : (a) 20000 Pa ; 16000 Pa (b) 20000 Pa, 1600 Pa (c) 4000 Pa ; 1600 Pa (d) 4000 Pa, 2000 Pa
2 cm5 cm25 cm 2.0 kg
g10m/s2
(a) 20000 Pa ; 16000 Pa (b) 20000 Pa, 1600 Pa (c) 4000 Pa ; 1600 Pa (d) 4000 Pa, 2000 Pa
1
39. In the experiment to verify the laws of reflection of sound we required two
cardboard (thick paper) tubes. The most appropriate dimensions of these tubes are. (a) Length __ 1.0 m ; diameter __ 3 cm (b) Length __ 50 cm ; diameter __ 6 cm (c) Length __ 50 cm ; diameter __ 3 cm (d) Length __ 10 cm ; diameter __ 6 cm
(a) 1.0 m ; __ 3 cm
(b) __ 50 cm ; __ 6 cm
(c) __ 50 cm ; __ 3 cm
(d) __ 10 cm ; __ 6 cm
1
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40. In order to measure the angle of incidence, the correct position of the protractor (Dee)
is shown in the set up :
(a) A (b) B (c) C (d) D
(a) A (b) B (c) C (d) D
1
41. In the experiment to determine the speed of a longitudinal pulse through a slinky, select the statement which is not correct. (a) One end of the stretch slinky should be firmly tied to the hook on a wall (b) The slinky should not touch any surface (c) The slinky should be short and non-flexible (d) The longitudinal pulse should be created gently in the slinky.
(a)
(b)
(c)
(d)
1
42. A student fixes two ends of a rope to two rigid supports A and B placed at a distance of 7.5 m. He then gives a transverse horizontal jerk to create a pulse in the rope which moves from A to B, B to A, again from A to B and B to A and so on. The moment he gives jerk to the rope his friend immediately starts the stopwatch. The pulse dies after completing three, to and fro journeys from A to B and back. The pulse takes 1 min and 15 s to complete its entire journey. The speed of the pulse moving on the rope is
