Holiday s Homework( )

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Maria Marylou Owen
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1 Holiday s Homework( ) CLASS 9 (ENGLISH) Prepare A Special Newspaper Edition, At Least 6 Pages On Big Charts About The The Life And Works Of The Authors Given Below:- Write A Brief Bio-Sketch About Their Books, Achievements, Awards, The Works (Poem/Story) You Like Most And Why, Critical Appreciation Of Their Works And Their Writing Style Etc. (Any One) Roll No (1-10) Roll No (11-20) Roll No (21-30) Roll No (31-38) Rabindra Nath Tagore / Kiran Desai Vikram Seth / Anita Desai Arundati Roy / Prem Chand Mulk Raj Anand / Kamla Das HINDI 1) व दक श प त और आध नक श प त म अ तर प ट करत ह ए आध नक श क स गकत पर ल ख त य र क जए 2) व दक समय म म हल ओ क थ त और श पर क श ड लत ह ए अन छ द ल खए 3) स च म त श ष क क प ट करत ह ए र म यण और मद भगवत ग त म स स च म त क उद हरण ज स र म-स व एव क ण और स द म क म त क चयन कर उस क ल ज य ल ख क प म त त क जए Maths 1. How will you minimize the expenses of your house by using different mathematical skills. 2. Practice extra question based upon Ch- 1,2,3. Social Science Prepare a project file on Disaster Management collecting information on Disaster Management departments of your state, Fire Service and Police etc. The project report should be hand written and not more than 15 sheets/pages. Physics:- Science 1. Differentiate between speed and velocity. 2. Why do passengers tend to fall back when it starts suddenly?

2 3. A bus decreases its speed from 80 km h -1 to 60 km h -1 in 5 s. Find the acceleration of the bus. 4.. Explain inertia and momentum 5. Prove that S=ut+1/2at 2 with velocity time graph. 6. A bus starting from rest moves with a uniform acceleration of 0.1 m s -2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled. 7. What do you mean by law of conservation of momentum? Derive it 8.. A train is travelling at a speed of 90 km h -1. Brakes are applied so as to produce a uniform acceleration of?0.5 m s -2. Find how far the train will go before it is brought to rest. 9. Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin? 10. A car is travelling with a speed of 36 km/h. The driver applied the brakes and retards the car uniformly. The car is stopped in 5 sec. Find (i) The acceleration of car and (ii) Distance before it stops after Appling breaks? 11. Explain, why is it difficult for a fireman to hold a hose, which ejects a large amount of water at a high velocity. 12. (a) Define average speed. (b) A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30 km/h. Calculate the average speed for the entire journey. 13. Write Newton s three laws of motion. 14. Velocity-time graph for the motion of an object in a straight path is a straight line parallel to the time axis. (a) Identify the nature of motion of the body. (b) Find the acceleration of the body. (c) Draw the shape of distance-time graph for this type of motion From a rifle of mass 5kg, a bullet of mass 50gram is fired with an initial velocity of 50m/s. Calculate the initial recoil velocity of the rifle. 16. Draw the shape of the distance-time graph for uniform and non-uniform motion of object. A bus of starting from rest moves with uniform acceleration of 0.1 ms 2 for 2 minutes. Find (a) the speed acquired. (b) the distance travelled. 17. Two objects of masses 100 g and, 200 g are moving along the same line and direction with velocities of 2 m/s and 1 m/s respectively. They collide and after the collision the first object moves at a velocity of 1.67 m/s. Determine the velocity of the second object. 18. When a carpet is beaten with a stick, dust comes out of it. Explain. 19. The graph given alongside shows how the speed of a car changes with time. (i) What is the initial speed of the car? (ii) What is the maximum speed attained by the car? (iii) Which part of the graph shows zero acceleration? (iv) Which part of the graph shows varying retardation? (v) Find the distance travelled in first 8 hours.

3 20. Study the velocity-time graph and calculate. (a) The acceleration from A to B (b) The acceleration from B to C (c) The distance covered in the region ABE (d) The average velocity from C to D (e) The distance covered in the region BCFE 21. (a) Derive third equation of motion. (b) A train starting from rest attains a velocity of 72 km/h in 5 minutes. Assuming the acceleration is uniform, find (i) the acceleration. (ii) the distance travelled by the train for attaining this velocity. Chemistry:- 1. A sample of water under study was found to boil at 102 o C at normal temperature and pressure. Is the water pure? Will this water freeze at 0 o C? Comment 2. Water as ice has cooling effect, whereas water as stream may cause severe burns. Explain these observations. 3. It is hot summer day. Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think will be more comfortable and why? 4. The sea water can be classified as homogeneous as well as heterogeneous mixtures. Comment. 5. Comment on the following statements:- (i) Evaporation produces cooling (ii) Even though sponge is compressible, it is a solid (iii) Temperature remains constant during melting or boiling 6. Why do solids have definite shapes and volumes? 7. Light is not considered to be matter. Why? 8. Rate of evaporation decreases with increase of humidity and rate of evaporation increases with increase in wind speed. Comment upon the above statements 9. Differentiate between compounds and mixtures. 10. Compare the properties of metals and non metals. 11. Differentiate between homogeneous and heterogeneous mixtures. 12. Is ammonia a compound or mixture? Explain giving reasons

13. What are volatile and non-volatile liquids? 14. Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non sonorous, non malleable and are colored.

4 13. What are volatile and non-volatile liquids? 14. Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non sonorous, non malleable and are colored. (i) Name a lustrous non metal (ii) Name a non metal which exists as a liquid at room temperature (iii) The allotropic form of non-metal is a good conductor of electricity. Name the allotrope (iv) Name a non-metal which is known to form the largest number of compounds (v) Name a non-metal other than carbon dioxide which shows allotropy (vi) Name a non metal required for combustion 15. Classify the following into elements, compounds and mixtures Cu, Sand, H2O, CaCO3, NaCl(aq), Zn, O2, Wood, F2,Hg, Diamond, Sugar(aq), Salt(aq), Methane, Soil {aq= water solvent} 16. (i) Under which category of mixtures will you classify alloys & why? (ii) A solution is always a liquid, comment (iii) Can a solution be heterogeneous? 17. How will you check the purity of liquid and solid? 18. Convert the following temperatures to Kelvin scale: (i) 34 o C (ii) 520 o C 19. Convert the following temperatures to Celsius scale: (i) 298 K (ii) 479 K 20. Look at the following figures and suggest in which of the glass containers, i.e. a, b, c or d, the rate of evaporation will be the highest? Explain. Biology :- 1. What is integrated fish culture? 2. Define apiculture. Mention its advantages. 3. What is endocytosis? What is the significance of this process? 4. How is DNA organized in a) Dividing cell b) Non-dividing cell?

5 5. What are the constituents of cellular membrane system? 6. What is fumigation? Why is it done? Name a solid fumigant. 7. Why plastids and mitochondria are called semi-autonomous organelles? 8. Differentiate between chromoplasts and leucoplasts. 9. Explain the structure of nucleus. 10. What is organic farming? Mention its advantages. 11. What is meant by composite fish culture? Mention its advantages? How can you overcome them? 12. Differentiate between osmosis and diffusion. 13. What will happen if a plant cell is kept in hypertonic solution? Name and explain that phenomenon. 14. How do pests affect the health of crop and reduce the yields? 15. What is hybridization? Explain its various types. 16. How do plants like Xanthium and Cypernius rotundus affect the growth of crop in field? 17. What is lactation period? 18. Cross-breeding programmes have brought revolutionary increase in livestock production. How? 19. Name some: i) Marine fishes ii) Freshwater fishes iii) Shell fishes 20. The shape of cell is directly linked to the function it performs. Explain the statement with two appropriate examples.

Ursuline Convent Sr. Sec. School. Biology

Ursuline Convent Sr. Sec. School Class IX : Holiday Homework : Session : 2017-18 Biology Q1. Read and prepare chapter 5(fundamental unit of life) for U.T. Q2. Read chapter 15 (Improvement in food resources)