NEW ERA SENIOR SECONDARY SCHOOL, NIZAMPURA SUMMER HOLIDAY ASSIGNMENT CLASS: IX

Transcription

1 (P.T.O.) NEW ERA SENIOR SECONDARY SCHOOL, NIZAMPURA SUMMER HOLIDAY ASSIGNMENT CLASS: IX NAME: ROLL NO.: DIV.: ENGLISH 1) Read the book Three men in a boat.write any three funny incidents of the story. 2) Read the English news paper every day. Pick out any problem sports politics etc. Write a letter to the editor based on this topic MATHEMATICS Factorize the following. ( To be done in ruled sheets ) (1) a 2 - b 2-4ac + 4c 2 (2) 7x x + 2 (3) 4a 2-4b 2 + 4a + 1 (4) x 4 + y 4 + x 2 y 2 (5) x 6 - x 3 (6) x 3-5x 2 x + 5 (7) x x + 6 (8) a 3 (b-c) 3 + b 3 (c-a) 3 + c 3 (a-b) 3 (9).8a 3 - b 3-12a 2 b + 6ab 2 (10) 4x 2 + 9y z 2-12xy - 30yz + 20xz (11) x 3 + 4x 2 + x 6 (12) 4x 4 + 7x 2 2 (13) x 2-2 3x 45 (14) 3-12(a - b) 2 (15) x x 10 (16) 8 x 2-62 x + 99 (17) 24 x 2-22 x 35 (18) 2x x 2-17 x 30 (19)x 3-3 x 2 - x + 3 (20) x x 2-7 x + 2 (21) x 2-29 x (22) x x 24 (23) x 2-9 x + 18 (24) 2 x 2-5 x 12 (25) x x + 6 (26) 3 x x + 2 (27)x x 10 (28) x 2-6x + 9 (29) 18x 2-39x + 20 (30) 6x 2-19x - 7. (31) 10x 2 + x - 2. (32) 6x 2-16x (33) 18x 3 +3x 2-6x. (34) x 3-8y 3-64z 3-24xyz (35) x 3 - y 3 + 3xy + 1 (36) 2 2a 3 + 8b 3-27c abc (37)64x y 3-64z xyz (38) 27x 3 + y 3 + z 3-9xyz (39) 27x 3-8y 3-125z 3-90xyz (40) (x+1) 3 (x-1) 3 (41) x y 6 (42) a 3-2 2b 3 (43) p (44) 9x 2-66xy + 121y 2 (45)64x 2 y z 2-80xyz (46) 8x y x 2 y + 54xy 2 (47) 27t 3 125u 3 135t 2 u +225 tu 2 (48) 64y z y 2 z + 300yz 2 (49) 25x 2 y 2 z 2-36u 2 (50) 27u t 3 (51) 125x 3 y z 3 (52) a 3 / 27 + b 2 / 64 (53) m (54) (x-2y) 3 + (2y 3z ) 3 +(3z x ) 3 (55) 27 x (56) 2 2a b c 3-6 6abc (57) X 3-8y 3 - z 3-6xyz (58) x 3-3 x 2 16x - 12 (59) x 3 +x 2 4x - 4 (60) x 6 1 (61) x 3 (62) x 3 7x + 6

2 SCIENCE PHYSICS: Write the answers in your physics notebook and submit it on Q-1 Give the Difference between Distance and Displacement. Q-2Define acceleration and show that it can be positive, negative or zero with suitable examples. Q-3 A car travelling at 36 km/h speeds up to 72 km/h in 5 seconds. What is its acceleration? If the same car stops in 20 seconds, what is the retardation (deacceleration)? Draw a v-t graph to show this. Q-4On a 120 m track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must the train travel the next 90 km so as to average the speed about 60 km/h for the entire trip? Q-5Swati swims 90 m long pool. She covers 180 m in 1 minute by swimming from one end to the other end back along the same straight path. Find Swati s average speed and average velocity. Q-6The motion of a cart is shown in the below Position-time graph. Give the answers to the questions from this graph. 1. During which time interval was the cart traveling at its greatest speed? 2. During which time interval was the cart traveling at its smallest (nonzero) speed? 3. During which time interval(s) was the cart at rest? 4. During which time interval(s) did the cart travel in a negative direction? 5. What total distance did the cart travel while moving in a negative direction? 6. What total distance did the cart travel while moving in a positive direction? 7. What total distance did the cart travel during the entire 44 seconds? 8. What was the cart's average speed during the entire 44 seconds?

3 9. What was the cart's net displacement for the entire graph? 10. What was the cart's average velocity during these 44 seconds? Q-7The motion of a Biker, Runner and walker is shown in the graph. Give the answers to the questions from this graph. 1. Compare the speeds of Biker, Runner and Walker from the slopes of the graph. 2. Calculate the average speeds forbiker, Runner and Walker. 3. At 4 sec calculate the speeds of Runner and Walker. 4. From the graph find out the time taken by Biker, Runner and walker to cover distance of 15 m. 5. At 1 sec find out the total distances covered by Biker, Runner and walker. 6. What total distance did Biker, Runner and Walker travel during the entire journey? CHEMISTRY: NOTE: Write your answers in your chemistry notebook submit it on Ammonia and hydrogen chloride gases are both pungent smelling in nature. These are released from the two opposite corners in a room. Which gas will first reach a person sitting in the centre of the room? 2. A gas jar containing air is inverted over another containing NO 2 gas which is brown in colour and heavier than air. After some time, brown colour is seen in the inverted gas jar too. Identify the phenomenon associated with this observation. 3. Convert the following temperature to the Celsius scale: a) 473K b) 350K c) 273K d) 400K e) 500K 4. Convert the following temperature to the Kelvin scale. a) Room temperature (25 0 C) b) Freezing point of pure water (0 0 C) c) Boiling point of pure water (100 0 C). 5. With the help of an activity show that the rate of evaporation increases with increase in surface area. 6. Give reasons for the following: a) The temperature of water remains constant during boiling. b) Wet clothes do not dry easily on a rainy day. c) Naphthalene balls disappear with time without leaving any solid. d) Water placed in earthen pot becomes cooler. 7. Temperature of the two bodies A and B is 23 o C and 46 o C respectively, find the temperature difference between the two bodies in kelvin. (P.T.O)

4 BIOLOGY: Write the answers in A4 size ruled papers and submit it on How do substances like carbon dioxide and water move in and out of the cell? 2. How is endoplasmic reticulum important for membrane biogenesis? 3. What is endocytosis? 4. What is the difference between chromosomes, chromatin and gene? 5. What is plasmolysis? Draw a diagram to show this phenomenon. 6. What is the full form of DNA? What is it made up of? Mention its function. 7. Give reasons: a) Lysosomes are called suicidal bags. b) Plant cells have few large vacuoles as compared to the many small vacuoles in animal cells. c) Mitochondria is called power house of the cell. d) Plasma membrane is called a selectively permeable membrane. e) The cell is called structural and functional unit of life. f) ATP is called the energy currency of the cell. 8. Differentiate between: a) Chloroplast and chromoplast b) Eukaryotic and prokaryotic cell c) Cisternae and cristae d) Nucleus and nucleolus 9. What will happen when a) Raisins are kept in water. b) Rheo leaves are boiled and then a drop of concentrated sugar solution is added on the leaves c) Plasma membrane of the cell breaks down. d) Golgi apparatus is removed from the cell e) Excess amount of fertilizer is added to green grass lawn. f) Salt is added to cut pieces of raw mango. g) Shelled raw egg and de shelled boiled egg are placed in water. h) Nucleus is called director of the cell. SOCIAL SCIENCE GEOGRAPHY Mark the following on a physical map of India. Mountain ranges: Karakoram, Zaskar, Himalaya, Aravalli, Vindhya, Satpura, Eastern and Western Ghats. Peaks: Kanchanjungha, K2, Anaimudi Plateau: Malwa, Deccan, Chhotanagpur Rivers: Ganga, Brahmaputra, Indus, Satluj, Narmada, Tapi, Godavari, Krishna, Kaveri Mahanadi DEMOCRATIC POLITICS Read any newspaper for one week and make clippings of news related to ongoing conflicts or wars and answer the following: 1. Classify these conflicts by their location ( your state, India, outside India) 2. Find out the causes for these conflicts. How many of these are related to power sharing disputes? 3. Which of these conflicts could be resolved by working out power sharing arrangements 4. Do you think that power sharing method is the best possible solution? Give reasons.

5 જર ત (ન ટ કમ લખ ) ૧ ૨ ભ રતન લ કશ હ વશ નબ ધ લખ. જર ત ભ ષ ન ક ઈ પણ દસ કહ વત લખ અન દર કન કમ સમ વ. स क त ग हक य स क त क न टब क म क जए 1) अ य भ ष ओ म य ग ह न व ल ( त सम और त व ) स क त श द क स च बन इय 2) आध नक क ल म स क त भ ष क मह व अपन श द म ल खए