Important Instructions for the School Principal. (Not to be printed with the question paper)

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1 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 printouts, 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 1 of 15

2 SUMMATIVE ASSESSMENT II, 2012 II, 2012 SCIENCE / Class IX / IX SC-1072 Time allowed : 3 hours Maximum Marks : General Instructions : (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix) The question paper comprises of two Sections, A and B. You are to attempt both the sections. All questions are compulsory. 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. All questions of Section-A and all questions of Section-B are to be attempted separately. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in one word or in one sentence. Question numbers 4 to 7 in Section-A are two marks questions. These are to be answered in about 30 words each. Question numbers 8 to 19 in Section-A are three marks questions. These are to be answered in about 50 words each. Question numbers 20 to 24 in Section-A are five marks questions. These are to be answered in about 70 words each. 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) (vii) (viii) (ix) Page 2 of 15

1. State the law of constant proportions. SECTION A / 2. What is the common feature between bryophytes and frogs? 3.

The cat, platypus and man are all mammals, yet one of the most unique feature of mammals when considered, helps to divide them into two groups.

In many species of mosquitoes the males do not prefer human blood, but females do. State why? 6.

Name them and also write the factors on which the magnitude of these forces depends on. 7. Define potential energy and derive an expression for it. 8.

3 1. State the law of constant proportions. SECTION A / 2. What is the common feature between bryophytes and frogs? 3. Name any two physical agents which cause weathering of rocks. 4. The cat, platypus and man are all mammals, yet one of the most unique feature of mammals when considered, helps to divide them into two groups. What is that feature? Mention two other characteristic features which are common to all the three animals. 5. What are vectors? In many species of mosquitoes the males do not prefer human blood, but females do. State why? 6. When an object is immersed into the fluid two forces act on the object in the vertically opposite directions. Name them and also write the factors on which the magnitude of these forces depends on. 7. Define potential energy and derive an expression for it. 8. What is meant by the term chemical formula? Write the chemical formula of Calcium Oxide. Calculate its formula unit mass. (Atomic mass of Ca 40 u, O 16 u) Ca 40 u, O 16 u 9. Draw a sketch of Bohr s model of an atom with two shells completely filled with electrons. Name sub-atomic particles of an atom with (i) positive charge (ii) without any charge. What is the valency of Aluminium whose atomic number is 13? Give reason. K L (i) (ii) 13 Page 3 of 15

10. What is the relationship between two elements X

respectively but their mass numbers remain same as

Why? Name the isotope used to treat Goitre Cancer.

On what basis does the embryo of cryptogam differ

Describe the feature that divides the angiosperms

State the two sub groups of angiosperms. 12.

List out any four features that all chordates will

For most microbes the organ they target is related

Furnish details of your answer under the following

organ Disease caused Mouth Bacteria Mouth Virus

An object of mass 500 gm is immersed into a

4 10. What is the relationship between two elements X and Y whose atomic numbers are 18 and 20 respectively but their mass numbers remain same as 40? Which has more number of electrons Na or Na +? Why? Name the isotope used to treat Goitre Cancer. X Y Na Na +? (i) (ii) 11. On what basis does the embryo of cryptogam differ from that of phanerogam? Describe the feature that divides the angiosperms into two groups. State the two sub groups of angiosperms. 12. What is the function of notochord? List out any four features that all chordates will possess. 13. For most microbes the organ they target is related to their point of entry. Furnish details of your answer under the following headings : Organ of entry Kind of microbe Target organ Disease caused Mouth Bacteria Mouth Virus State the two important ways by which an infectious disease can be treated State Archimedes principle. An object of mass 500 gm is immersed into a measuring jar containing water. The initial level of water in the measuring jar is 50 cc. Due to the immersion of the object the water level in the measuring jar reaches to 100 cc. Calculate the mass of the water displaced due to the immersion of the object cc 100 cc Page 4 of 15

5 15. Define one joule of energy. Two cars X and Y of masses m 1 and m 2 accelerate from rest in linear direction. The mass of Y is twice of X. The acceleration due to car X is 1 ms 2. After a time of t seconds it is noticed that the Kinetic energy of X is twice of Kinetic energy of Y. Calculate the acceleration produced by the car Y. m 1 m 2 X Y, Y X X 1 ms 2 X Y Y 16. A bus starts from rest accelerates against friction due to road from t 0 sec to t 10 sec. Then it is allowed to decelerate from t 11 sec to t 30 sec. Comment about the nature of work done in these different time intervals. What is the work done by the force of gravity on a satellite while moving around the earth? Justify your answer. t 0 t 10 t 11 t 30 t 17. What are the basic factors on which the speed of sound in a medium depend? Why sound waves are called mechanical waves? How will you differentiate a high pitch sound from a low pitch sound with the help of a graph? 18. Explain the role played by lichens, moss and trees in soil formation. 19. How is smog formed? How does it affect human health? 20. Define mole. How is it related to Avogadro s constant? Calculate the number of molecules in 56 gms of nitrogen gas. (Atomic mass of N 14u) Write the names of elements present in the following compounds : (i) Slaked lime (ii) Hydrogen bromide 56 g N 14u (i) OR/ (ii) Page 5 of 15

Define atomicity. What is the atomicity of phosphorus?

What do you understand from the statement relative atomic mass of sulphur is 32?

roundworm. What is peculiar about the coelom of Arthropods? What is such a condition called? Explain.

List out the conventions that are to be followed while writing the scientific names.

State and prove law of conservation of energy for a freely falling body.

6 Define atomicity. What is the atomicity of phosphorus? Which postulate of Dalton s atomic theory is the result of the law of conservation of mass? What do you understand from the statement relative atomic mass of sulphur is 32? (d) How many atoms are present in a molecule of HNO 3? 32 u (d) HNO What is coelom? State its significance. Pick out the organisms that have a pseudocoelom from the following : earthworm, pinworm, tape-worm and roundworm. What is peculiar about the coelom of Arthropods? What is such a condition called? Explain. (d) To which phylum of Animalia do the following animals belong to : octopus, pila, chiton and unio? Comment on their coelom. (d) OR/ Name the taxonomist who introduced the present scientific naming or nomenclature. List out the conventions that are to be followed while writing the scientific names. State the scientific name of rohu. Draw and label the same. 22. State and prove law of conservation of energy for a freely falling body. What is the power expended by the engine of the car mass 1.5 tonnes which increases the velocity of the car from 36 km/hr to 72 km/hr in 20 seconds km/hr 72 km/hr OR/ Define Kinetic energy and derive an expression for it. How many joules of energy make one KWh. A bullet of mass 50 gm is fired from a gun. It leaves the barrel with a velocity of 100 m/s in 0.01 seconds. Calculate the power expended by the gun in firing the bullet. Page 6 of 15

KWh 50 0.01 100 m/s 23. How does the ear drum of human ear vibrate? Write an expression relating wave velocity, wave length and time period?

What will be the linear distance between an adjacent crest and trough.

Write a difference between pitch of sound and loudness. The depth of sea at a point is 15300 m.

7 KWh m/s 23. How does the ear drum of human ear vibrate? Write an expression relating wave velocity, wave length and time period? The frequency of a sound source is 600 Hz. The speed of sound in a medium is 330 m/s. What will be the linear distance between an adjacent crest and trough. 600 Hz 330 m/s OR/ What is the role of hammer bone, anvil bone, stirrup bone and cochlea of human ear in hearing a sound? Write a difference between pitch of sound and loudness. The depth of sea at a point is m. Find out after what time the sound signal sent by a SONAR device fitted in the ship will reach the sea bed from that point. Take the speed of sound in sea water as 1530 m/s m/s 24. Complete the given oxygen cycle : State four forms in which oxygen is found in the earth s crust. Give an example where oxygen does not support life / life activities. Page 7 of 15

OR/ State the group of compounds that leads to ozone depletion?

How do modern farming practices harm soil health?

In an experiment to verify the law of conservation of mass in a chemical

before the experiment only after the experiment both before and after

A student performed an activity to verify the law of conservation of

8 OR/ State the group of compounds that leads to ozone depletion? What is the significance of an intact ozone layer to us? How do modern farming practices harm soil health? (List 3 points) SECTION B / 25. In an experiment to verify the law of conservation of mass in a chemical reaction weighing the flask with its contents is done carefully : only before the experiment only after the experiment both before and after the experiment (d) weighing is not essential. (d) 26. A student performed an activity to verify the law of conservation of mass using solution X and Y. Identify the solution Y which can react with X namely Sodium chloride. Lead Nitrate Barium Chloride Sodium Sulphate (d) Sodium Carbonate X Y X (d) Y Page 8 of 15

27. Bony fish is characterized by the presence of : Scales as

as exoskeleton Bones and scales as exoskeleton (d) Bones and

Reena has observed leaf and stem like structures in the given

9 27. Bony fish is characterized by the presence of : Scales as endoskeleton, bones as exoskeleton Bones as endoskeleton, scales as exoskeleton Bones and scales as exoskeleton (d) Bones and scales as endoskeleton (d) 28. Reena has observed leaf and stem like structures in the given specimen of a plant. The specimen she has observed is : fern spirogyra mushroom (d) funaria (d) Page 9 of 15

10 29. Four animals A, B, C and D are given. The animals that belong to phylum Annelida are : A, B and D B, C and D A, B and C (d) C, A and D A, B, C D A, B D B, C D A, B C (d) C, A D 30. Which among the following is the correct identification of the given two plants? (d) A is thallophyte and B is pteridophyte A is pteridophyte and B is thallophyte both A and B are pteridophyte both A and B are thallophyte Page 10 of 15

11 A B A B A B A B (d) A B 31. Flowers of a monocot plant are generally bimerous trimerous tetramerous (d) pentamerous (d) 32. The breeding ground for mosquitoes is generally : ocean water running water stagnant water (d) sea water (d) 33. In finding the mass of a 33 gm object a student was asked to choose one of the following spring balances. Which of the following spring balances he has to choose to measure the mass of the object accurately. Either balance A or balance B Either balance C or balance D Both balance A and balance C (d) Both balance A and balance D 33 Page 11 of 15

the following observation was made by taking the readings of

object, Four students A, B, C and D took the readings.

students A, B, C and D : A : 7.5 gms B : 6 gms C : 5.

12 A B C D A C (d) A D 34. While measuring the mass of an object using a spring balance the following observation was made by taking the readings of spring balance before hanging the object and after hanging the object, Four students A, B, C and D took the readings. The mass of the object shown in the diagram is given by four students A, B, C and D : A : 7.5 gms B : 6 gms C : 5.5 gms D : 4.5 gms The correct observation is made by : A B C (d) D A, B, C D A : 7.5 B : 6 C : 5.5 D : 4.5 A B C (d) D Page 12 of 15

13 35. An object suspended from spring balance is immersed into the overflowing jar filled with water. Due to the immersion some amount of water gets displaced and is collected in a beaker and the weight of the displaced water is found. Of the four statement the correct one is : The upthrust offered weight of the water displaced loss of weight of the object. The upthrust offered > weight of the water displaced > loss of weight of the object. The upthrust offered < weight of the water displaced < loss of weight of the object. (d) The upthrust offered weight of the water displaced < loss of weight of the object. > > < < (d) < 36. The weight of the water displaced due to immersion of an object inside it Increases with the decrease in the volume of the liquid Increases with the increase in the density of the liquid Increases with the increase in the volume of the liquid (d) Increases with the decrease in the density of the liquid (d) 37. If m is the mass of a cuboid and it rests on sand on face of area A, then pressure exerted by the cuboid on the sand is m/a Pascal m g/a Pascal mg. A Pascal (d) mg / A 2 Pascal m A m/a Pascal m g/a Pascal mg. A Pascal (d) mg / A 2 Pascal 38. In the following for measuring the depth of immersion of a solid cuboid the right method is : Keep the cuboid on the sand bed and mark the level of immersion on the cuboid without touching it and take the measure of depth of immersion. Keep the cuboid on the sand bed and measure the level of immersion using the scale without removing the cuboid. Keep the cuboid on the sand bed and remove it. Take the measure of immersion from the imprints on the sand bed. (d) Keep the cuboid on the sand bed and without removing it hold it with one hand and mark the level of immersion on the cuboid and take the measure of immersion. Page 13 of 15

sound four students Rahul, Rajesh, Ranjit and Ramesh

For moving the incident wave for 10 towards the

the reflected wave moves 10 away from the normal.

The correct observation is of student : Rahul Rajesh

In an experiment to verify the laws of reflection of

reflection is : 30 45 60 (d) 90 Page 14 of 15

14 (d) 39. While doing the experiment on laws of reflection of sound four students Rahul, Rajesh, Ranjit and Ramesh made observations in the following manner Rahul : For moving the incident wave for 10 towards the normal with respect to the sound reflecting board the reflected wave moves 10 away from the normal. Rajesh : For moving the incident wave for 10 towards the normal with respect to the sound reflecting board the reflected wave moves through the same angle towards the normal. Ranjit : For moving the incident wave for 10 towards the normal with respect to the sound reflecting board the reflected wave moves 20 away from the normal. Ramesh : For moving the incident wave for 10 towards the normal with respect to the sound reflecting board the reflected wave moves 20 towards the normal. The correct observation is of student : Rahul Rajesh Ranjit (d) Ramesh (d) 40. In an experiment to verify the laws of reflection of sound for the given angle of incidence the angle of reflection is : (d) 90 Page 14 of 15

30 45 60 (d) 90 41. A pulse is generated at one end of the slinky of length 10m. The pulse returns back to its point of generation in 10 seconds.

15 (d) A pulse is generated at one end of the slinky of length 10m. The pulse returns back to its point of generation in 10 seconds. The velocity of the pulse in the slinky will be : 4 m/s 3 m/s 2 m/s (d) 1 m/s 10 m 10 4 m/s 3 m/s 2 m/s (d) 1 m/s 42. A longitudinal pulse is produced in a slinky. The frequency of the pulse is 60 Hz and it travels at a speed of 30 cm/s. The separation between consecutive compression is : 90 cm 0.5 cm 2 cm (d) 1.25 cm 60 Hz 30 cm/s 90 cm 0.5 cm 2 cm (d) 1.25 cm - o O o - Page 15 of 15

Note: Please ensure that these instructions are not printed with the question paper being administered to the examinees.

Note: Please ensure that these instructions are not printed with the question paper being administered to the examinees. 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