Download 1 vidya devi jindal school, hisar summer holiday`s assignment class

VIDYA DEVI JINDAL SCHOOL, HISAR
SUMMER HOLIDAY’S ASSIGNMENT
CLASS-IX (SESSION: 2017-18
SUBJECT – MATHEMATICS
NUMBER SYSTEM
1. Find 4 rational numbers between
4
5
and
5
6
.
2. Classify the following as rational or irrational:
(i) 2 + √3 , (ii) √144 , (iii) 4.7777…, (iv) 1.020020000200002… .
3. Simplify:(3√5 + 2√3) (3√5 − 2√3)
4. Visualise: 4.235 on the number line.
5.
Change
into
6. Rationalise:
rational
4 + √15
4 − √15
number
:
2. 43̅ ,
(a)
(b)
√98
√2
11,
(c)
̅̅̅ ,
2. ̅35
(d) √0.0144 .
.
7. Simplify: (25/9) 3/2  (81/16) 3/4 .
8. Represent √10 on the number line.
9. If
5+2√3
7+4√3
= 𝑎 − 𝑏√3 , find ‘a’ and ‘b’ if ‘a’ and ‘b’ are rational.
10. Simplify: ( 272/3 ÷ 271/3 × 27 –4/3 ) {( 324/5 )3/4}0 × ( 172 – 82 )1/2 .
POLYNOMIALS
1.What is the degree of the polynomial 4p4 + 7p2 – 15?
2.Factorize: (i) x2 – 10x – 24 , (ii) x3  8.
3. Write (3a + 4b  5c) 2 in expanded form.
4. Find the value of K, if x-1 is a factor of P(x) = 2𝑥 2 + 𝑘𝑥 + √2.
5. (i) Factorise: 36x2 + 84x + 49 – 25y2
(ii) Evaluate using identity: 253 – 173 – 83.
6. Factorize: (i) 18x2 - 50y2 , (ii) 𝑥 3 − 6𝑥 2 + 11𝑥 − 6 , (iii) (x2 – 5x +6)2 – (x2 – 6x +8)2.
7. Evaluate: (i) 104  96 ; (ii) 983 .
8. Factorize: (i) 250x3 – 128y3 , (ii) 36x2 + 84x + 49 – 25y2.
9. Factorize: (i) x3 – 12x(x–4) – 64. (ii) 2x2 + y2 + 8z2 – 2√2xy + 4√2yz – 8xz,
(iii) 5√5𝑥 2 + 20𝑥 + 3√5, (iv) a(a−1) – 𝑏(𝑏 − 1).
10. Find the value of k if (x  1) is a factor of 4x3 + 3x2  4x + k.
11. Evaluate using identity: 303 – 183 – 123.
12. If a = 4 – √15 , find the value of 𝑎2 +
1
𝑎2
.
COORDINATE GEOMETRY
1. Write the co-ordinates of a point:
(i) whose abscissa is zero and ordinate is (-4).
(ii) the perpendicular distance from x and y axes are 5 and 3 respectively.
Also mention the quadrant or axis on which they are lying.
2. Write the co-ordinates of the point where two axes meet.
3. Plot the following points in a Cartesian plane :
A (–2 , –7) , B (–4, 0) , C (–3,5) , D (5, –3) , E (0, –2) , F ( 1/2 , 1/2 ).
4. Write the co-ordinates of a point:
(i) lies on the y-axis and is at a distance of 2 units below the origin.
(ii) the perpendicular distance from x and y axes are 6 and 7 respectively.
5. Locate the points on the Cartesian plane:
(-2,4), (0,1),(-1, 0), (5, 2), (-3,-5), (2,-4) lie.
6. Name the quadrant in which the following points lie (3, 2), (4, 3), (5, 4) and (3, 2).
7. Plot the points (0,0),(0,4),(3,0),(4,3). Observe the figure and name it. Find the area of
the figure.
8. Draw the quadrilateral with vertices (-4,4), (-6,0), (-4,-4) and (-2,0). Name the
quadrilateral and find its area.
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SCIENCE
CHEMISTRY
Chapter- 1 Matter In Our Surrounding
Multiple Choice Questions
1. Which one of the following sets of phenomena would increase on raising the temperature?
(a) Diffusion, evaporation, compression of gases
(b) Evaporation, compression of gases, solubility
(c) Evaporation, diffusion, expansion of gases
(d) Evaporation, solubility, diffusion, compression of gases
2. Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of
temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set
of conditions
(a) Low temperature, low pressure
(b) High temperature, low pressure
(c) Low temperature, high pressure
(d) High temperature, high pressure
3. The property to flow is unique to fluids. Which one of the following statements is correct?
(a) Only gases behave like fluids
(b) Gases and solids behave like fluids
(c) Gases and liquids behave like fluids (d) Only liquids are fluids
4. During summer, water kept in an earthen pot becomes cool because of the phenomenon of
(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation
5. A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the
following represents a correct arrangement?
(a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air
6. On converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of temperature will be
(a) 298K,311Kand339K
(b) 298K,300Kand338K
(c) 273K,278Kand543K
(d) 298K,310Kand338K
7. Choose the correct statement of the following
(a) conversion of solid into vapours without passing through the liquid state is called vapourisation.
(b) conversion of vapours into solid without passing through the liquid state is called sublimation.
(c) conversion of vapours into solid without passing through the liquid state is called freezing.
(d) conversion of solid into liquid is called sublimation.
8. The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of
the following correctly represents their boiling points in kelvin scale?
(a) 306 K, 329 K, 391 K
(b) 308 K, 329 K, 392 K
(c) 308 K, 329 K, 391 K
(d) 329 K, 392 K, 308 K
9. Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of water (b) Decrease in temperature of water
(c) Less exposed surface area of water (d) Adding common salt to water
10. In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container.
(ii) Some hydrogen gas leaking out of the container.
(iii) Increasing the volu me of the container of hydrogen gas.
(iv) Adding more hydrogen gas to the container without increasing the volume of the container.
(a) (i) and (iii) (b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Long Answer Questions
11. You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to
separate them with well labelled diagram.
12. It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would
be more comfortable and why?
13. You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would
you take to dry it faster?
14. Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous
solution decreases with increase in humidity. (c) Sponge though compressible is a solid. 15. Why does the temperature of a substance remain constant during its melting point or boiling point?
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BIOLOGY HOME WORK
I Answer the following question
1.There would be no plant life if chloroplasts did not exist. Justify.
2. Why were the scientists not able to observe most of the cell organelles before 1940?
3.Why Plant cells are are more rigid than animal cells?
4.What is nucleoid?
5.What is the function of chromosomes?
6.Give an example of
(a) Prokaryotic organisms
(b) Eukaryotic organisms
(c) Unicellular organism
(d) multicellular organism
7.Differentiate between unicellular and multicellular organisms.( on the basis of cell number,division of labour and cell
number)
8.Why is the nucleus so significant in a cell?
9.What is membrane biogenesis?
10.Who discovered the nucleus of a cell?
11.Name the plastid which stores starch, oil and protein granules.
12.What is the function of SER in liver cells of vertebrates?
13.Explain the importance of osmosis for living beings?
14.Which substance is responsible for transfer of characters from one generation to another?
15.Differentiate between plant and animal cell.
II Label the parts (1 to 13) of animal cell and (A to G) of plant cell
ANIMAL CELL
PLANT CELL
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III
SUBJECT- SOCIAL SCIENCES
Chapter 1 and 2 India: Size and Location and India’s Relief Features| Geography | Class IX.
Q1.Study about importance of longitude and latitude ?
Q2.What are the factors that define India’s Central location?
Q3.Why there is time difference between the northern and the southern extremes of India?
Q4. Mention the names of two island groups found in India.
Q5. How does India occupy strategic location in India Ocean?
Q6. On the outline map of India mark any five Himalayan Mountain Peak of your choice.
Q7. How longitudes help in calculating the time of a place?
Q8. What do you mean by doab? Mention its two features.
Chapter 1 The Story of Village of Palampur | Economics | Class IX .
Q1. Study agriculture practices in your nearly villages and draft a report on your observations?
Q2. How is land fixed in the village Palampur?
Q3. What is standard unit of measuring land in hectare?
Q4. Where do the villagers of palampur sell jaggery ?
Q5. How are the villagers able to grow more than one crop in palampur?
Q6. What is Green revolution?
Q7. Mention the main disadvantages of Green Revolution.
Q8. Distinguish between working capital and fixed capital?
(History- Civics)
Topic: Write on the following questions:
1. What is the’ Legal framework Order’?
2. Elections were held in Pakistan yet they were not considered democratic. Why?
3. Give a simple definition of democracy. What are the basic rules democracies must respect?
4. What are the arguments against Democracy? [5 reasons]
5. Why is democracy a better form of government?
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SUBJECT – ENGLISH
Do the following assignments from BBC Compacta:
READING SKILL :
(i) Unseen Passage – BBC Module -1
(a) Classroom Assignment – 2-4 (pg. no. 6-11)
(b) Practice Assignment – 2-4 (pg. no. 22 – 27)
NOVEL – The Three Men in a boat
Read and make notes in points from chapter 1-10
____________________________________________________
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