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DPS – MIS, DOHA- QATAR SUMMATIVE ASSESSMENT - I (2011–12)

CLASS: IX

Subject: General Science Date: 20-09-2011

Time allowed: 3 hours Maximum Marks: 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 one sentence.vi) Question numbers 4 to 7 are two mark questions, to be answered in about 30 words each.vii)Question numbers 8 to 19 are three mark questions, to be answered in about 50 words

each.viii) Question numbers 20 to 24 are five mark questions, 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 choose one most appropriate response out of the four provided to you.

x ) Please note that there are 12 printed pages

Section –A

1. Convert the temperature 470K to Celsius scale. 1

2. Calculate the momentum of a cricket ball of mass 120 g which is rolling along the ground with a velocity of 2 m/s. 1

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3. Mention two ways by which a photosynthesizing cell is different from a cell in your body. 1

4. A solution contains 30 g of solute in 270 g of solvent . Calculate the concentration of solution in terms of mass by mass percentage of the solution. 2

5. (a) What do you mean by weight? (b) Mass of an object is 50 kg. What is its weight on the earth? 2

6. A. Identify the type of tissues in the following and write one important characteristic of each type. 2

a. Skin b. Bark of the tree

7. Two cells of the same type are placed in solution A and solution B. the following observations were recorded.

Briefly explain giving reasons in each case. 2

8. What is evaporation? How is the rate of evaporation affected by

i. Increase of humidity ii. Wind speed? 3

9. ‘An alloy cannot be separated into their components by physical methods’ Why are they considered as mixture and not compound? Explain two reasons in support of your answer. 3

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10.(a) State Universal law of gravitation. What is the importance of universal law of gravitation?

(b) The gravitational force between two objects is F. If masses of both objects are halved without changing distance between them, what is the new gravitational force between them? 3

11.(a) In a high jump athletic event, athletes are made to fall on a cushioned bed. Give reason for this. (b) A large truck and a small compact car have a head-on collision. Which one experiences a larger force? Explain. Which one experiences a greater acceleration? Explain. 3

12. The following figure shows a circular race track of radius 100 m.

(a) If a race car takes 1 minute 20 seconds to complete one lap calculate its speed.

(b) Draw the direction of velocity of the race car, which is travelling at constant speed, when it is at point P. (c) Is the car accelerating? Give reason for your answer. 3

13. (a) What do you mean by free fall? (b) A ball is thrown straight up with a velocity of 30 m/s. How high does it go? How long it is in the air? 3

14. State the law of conservation of momentum. Discuss how momentum is conserved when a bullet is fired from a gun. 3

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15.A. Due to some fungal infection in a plant, a tissue got blocked and the plant wilted. Name the tissue and give reasons to support your answer

B. Name the living component common to both the complex permanent tissues in plants.

C.Give two structural differences and one similarity between sieve tubes and vessels. 3

16.a. Given below is the structure of a neuron. 3

b. Differentiate between areolar and adipose tissue.

17.A. What is membrane biogenesis? 3

B. Lysosomes are known as scavengers of the cell. Justify.

C. Where would you find more number of ribosomes – in cancer cells or ordinary cells? Why?

18. A. Mention the two factors on which irrigation depends. State two ways by which irrigation is beneficial. 3

B. How are dug wells different from tube wells? 19.A. Which is the most advantageous and prevalent fish culture system? Explain the technique used. 3 B. State two advantages of the above system

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20. a. Explain giving reason: 5

i. Naphthalene balls disappear with time without leaving any solid.

ii. Hot tea is sipped from a saucer.

b. Suggest an activity to show that matter consist of very small particles.

OR

a. Explain the terms-i. Latent heat of fusionii. Sublimation

b. A crystal of copper sulphate is dropped into a beaker containing hot water and another beaker with cold water .i. What do you observe just above the solid crystal in the beaker?ii. Name the process involved.iii. Does the rate of mixing changes with temperature? Explain why?

21. When we dissolve sugar, chalk powder and milk into three beakers A, B and C containing water respectively, what do you observe? 5

i. When mixture A is passed through filter paper

ii. When a beam of light is passed through B

iii. Mixture C is allowed to stand for some time OR

a. What are the important points of difference between element and compound?

b. How will you separate a mixture of kerosene and water? Explain with the help of a diagram.

22. (a) Derive the equation of motion s = u t + ½ a t2 by plotting velocity – time graph for an object in uniformly accelerated motion.

(b)The distance – time graph for the motion of a car is given below. Draw the corresponding velocity – time graph and describe the motion of the car in the first 6 seconds. 5

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OR (a) With the help of velocity – time graph for uniformly accelerated motion obtain the equation v2 = u2 + 2 a s. (b) The velocity vs. time graph of a truck is plotted below. Calculate: (i) deceleration of the truck (ii) the total displacement of the truck.

23. (a) State and derive Newton’s Second law of motion. (b) A 10 kg box is placed on a table. A horizontal force of 32 N is applied to the box. A frictional force of 7 N is present between the surface and

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the box. Calculate the acceleration of the box.

OR

(a) State Newton’s first law of motion. (b) What do you mean by inertia? Name the physical quantity which determines the inertia of an object. (c) Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest? 5

24. . The use of manure is better than the use of fertilizers. Mention two points in support of this statement. 5

B. A farmer has practiced mixed cropping. How would you convince the advantages of intercropping method over this method? C. What is crop rotation? State the factors that decide the crops for crop rotation.

OR

A. What are weeds? How do they affect the growth of crops? Enlist two ways to control weeds.

B. What are the advantages of organic farming?

Section-B (MCQ)

25. Which of the following is the correct statement?

a. FeS is soluble in CS2

b. Fe is soluble in CS2 and S is insoluble in CS2

c . Both Fe and S are soluble in CS2

d. Fe is insoluble in CS2 and S is soluble in CS2

26. Which of the following constitutes the heterogeneous mixture?

a. sodium chloride and water b. copper sulphate and water

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c. alum and water d. sulphur and water

27. What type of solution will be formed when starch is added to hot water?

a. true solution b. suspension

c. colloidal sol d. non-aqueous solution

28. Which of the following diagram is correct in case of filtration of true solution?

a b c d

29. Which of the following mixtures can be separated using the given experimental

set up?

a. common salt and sugar b. common salt and ammonium chloride

c. acetone and water d. iron and sulphur

30. When dilute sulphuric acid is added to zinc granules, you will observe that:

a. a precipitate is formed

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b. the reaction mixture turns yellow

c. The container becomes hot

d. Bubbles start coming out from the surface of zinc granules

31. In the chemical reaction shown below, which of the following is an incorrect statement?

a. It is a decomposition reaction.

b. white coloured magnesium oxide is formed.

c. Mg ribbon burns with a dazzling white flame.

d. It is an exothermic reaction.

32. What type of chemical reaction takes place when iron is added to an aqueous solution of copper sulphate?

a. displacement reaction b. double displacement reaction

c. combination reaction d. thermal decomposition reaction

33. When a mixture of iron fillings and sulphur powder is heated , it is seen that :

a. iron fillings start melting first

b. sulphur starts melting first

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c.both iron fillings and sulphur melt together

d.nothing happens initially and after sometime the mixture becomes red hot

34. Balu was given a mixture of sand , common salt and ammonium chloride. The correct sequence he should follow to separate this mixture is.

a. dissolution, distillation, decantation and filtration.

b. filtration, sublimation, decantation and evaporation.

c. sublimation, dissolution, filtration and evaporation.

d. filtration, dissolution, evaporation and sublimation.

35. A student set up the following apparatus for studying Newton’s third law of motion. He placed a weight of 0.1 N on the pan. What will be the reading shown by the spring balances?

a) 0.1 N in both the balances.b) 0.1 N in balance 2 and 0.2 N in balance 1c) 0.1 N in balance 2 and 0 N in balance 1.d) Data insufficient.

36. According to the third law of motion, action and reaction a) Always act on the same body b) Always act on different bodies in opposite directions c) Have same magnitude and directions

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d) Act on either body at normal to each other

37. To observe squamous epithelium, the sample of the tissue is taken from

a. Skin c. Onion peel b. Inner lining of the cheek d. All the above

38. A student identified the following diagram as that of voluntary muscle fibres

The identification was indicated by the presence of

a. Fluid matrix c. Tall pillar like cells

b. Many nuclei in the periphery d. Many cells fused together

39. On adding a solution of ‘X’ to corn flour extract, the colour changed to bluish black. Identify the solution ‘X’

a. Bromine solution c. Iodine solutionb. Benedict’s solution d. Hydrochloric acid

40. Given below is the diagram showing the structure of a parenchyma cell

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Which parts are not labeled correctly?

a. Cell wall and cell membrane c. Inter cellular space and cytoplasm

b. Nucleus and cell wall d. Nucleus and cell membrane

41. A student observed that water added to arhar dal became yellow in colour. A sample of this yellow water turned pink when a few drops of HCl was added. Identify the adulterant added to the dal.

a. Turmeric c. Yellow dye

b. Potassium dichromate d. Metanil yellow

42. The cellular component not seen while observing the slide of an onion peel under a compound microscope is

a. Ribosomes c. Cell wall

b. Nucleus d. Cytoplasm.

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