HURDCO International School

English Language, Class IX

Section 2: Reading for Ideas,Day 1 and 2

Passage 2-Seduced by Technology

1. My neighbor, Nick, is a soft-spoken, easy-going fellow who owns a big, ungainly dog called Duffy and has a

passion for music. He's been a freelance musician all his adult life and plays the double-bass for a living. But

things have changed in the music business: it's not as easy to earn a living as a freelance musician today as it

was a few years ago. A lot of the well-paid "session work" (making commercials and advertising jingles) has

disappeared and been replaced by pre-programmed, computerized synthesizers. Nick still plays in the "pit" when he can - in touring musicals like Miss Saigon or Phantom of the Opera. But today he also works part-time

in a music store, helping to ship out trumpets and French horns to school bands and re-stocking the inventory

when new shipments arrive.

2. Nick is not untypical these days. In fact, his story is just one of millions that unveil the other side of the

computer revolution—the human costs and consequences of the new "wired world" which receive little attention

from government bureaucrats or industry boosters.

3. Fantastic claims about the benefits of the coming "information age" are hard to escape. The press is full of

hacks praising the liberating virtues of electronic mail and tub-thumping about how the Internet will unite the

masses in a new democracy (at least those with a personal computer, modem and enough spare cash to pay the

monthly hook-up fee). "If you snooze, you lose" is the message shouted by the advertising media. Jump on

board now or be brushed aside as the new high-tech era reshapes the contours of modern life.

4. The ideology of progress is welded as firmly to computers in the 1990s as it was to the power-loom in the early

nineteenth century, the automobile in the 1920s or nuclear power in the 1960s. Yet the introduction of all these

technologies had disastrous side effects. The power-loom promised cheap clothing and wealth for the United

Kingdom but produced catastrophic social dislocation and job loss. The car promised independence and freedom

and delivered expressways choked with traffic, suburbanization, air pollution and destructive wars fought over oil supplies. Nuclear power promised energy "too cheap to meter" and produced Chernobyl and Three-Mile Island.

5. There is a lesson here that can and should be applied to all new technologies—and none more than so than

computers. Marshall McLuhan said it best: "We shape our tools and thereafter our tools shape us." Technology

is not just hardware—whether it's a hammer, an axe or a desktop PC with muscular RAM and a Pentium chip. It's

not things that are the problem, it's people. Even seemingly beneficial technologies can have earth-shaking

social consequences.

1 (a) Notes: Read Passage 1 in the Insert and answer all the questions below.[12 Marks] Identify and write down the content points in the passage which describe the advantages/claims of

computer technology and drawbacks of each claim of advantages as outlined in the passage.

Claims/Advantages of Computer Technology

• Music is now preprogrammed/computerized synthesizers

Drawbacks of claims/advantages

• Freelance musicians lost their well-paid session work

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Section 2: Reading for Ideas

1 (b) Summary [10 Marks]

Now use your notes to write a summary in which you describe the advantages/claims of computer

technology and drawbacks of each claim of advantages as outlined in the passage.

This time, you will be awarded up to 10 marks for using your own words wherever possible

and for accurate use of language.

Your summary, which must be in continuous writing (not note form), must be no longer than 160-180

words, including the 10 words given below. Begin your summary as follows:

Computer is an electronic device which is very useful because ---------------------------------

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G- 9

Bangla language

evMaviv I cÖev`- cÖePb eB †_‡K wUK †`Iqv n‡q‡Q ( 268-460) Gi g‡a¨ †gvU 56wUi A_© wkL‡e |

M`¨ : evOjv kã

‡jLK : ûgvqyb AvRv`

K¬v‡m cov‡bv n‡q‡Q

➢ cy‡iv M`¨wU Avevi evmvq c‡o ywU K‡i mcq cÖkœ , PviwU DËimn Ges mwVK Dˇi wUK w`‡e|

➢ ywU GK K_vi Dˇii cÖkœ, DËimn wjL‡e|

mv`v KvM‡R bvg I †mKkb wj‡L Rgv †`‡e|

wb‡P †`Iqv Work Sheet ¸‡jv K‡i Avb‡e|

1 RMv wLPzwo 6 †Q‡ji nv‡Zi †gvqv

2 QvB †dj‡Z fvOv Kzjv 7 QvB Pvcv Av¸b

3 R‡j Kzwgi WvOvq evN 8 wRjvcxi cu¨vP

4 †Svc ey‡S †Kvc gviv 9 Suv‡Ki ˆK

5 wS‡K †g‡i †eŠ‡K †kLv‡bv 10 UbK bov

wb‡P †`Iqv Dchy³ evMaviv / cÖePb/ ‡Rvovk‡ãi msL¨vwU †e‡Q wb‡q cÖwZwU ev‡K¨i k~b¨¯’vb c~iY Ki|

1 Iiv me GKUv‡K cvKovI Ki‡Z cvi‡j evKx¸‡jvI aiv co‡e|

2 GB kvšÍ †Q‡jwU †hb ,Rbmgv‡e‡k fvlY w`‡q mevB‡K ZvK jvwM‡q w`j|

3 Zzwg wK Avgv‡K †c‡qQ , hv ej‡e Avwg Zv B Kie ?

4 Avgv‡`i †`‡ki e¨emvqx‡`i Af¨vm, †Kv‡bv mgm¨v n‡jB wRwb‡mi `vg

evwo‡q †`q|

5 PvKwiUv ‡Zv bq †h cixÿv cvk K‡iB †c‡q hv‡e !

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wb‡P †`Iqv Dchy³ evMaviv / cÖePb/ ‡Rvovk‡ãi msL¨vwU †e‡Q wb‡q cÖwZwU ev‡K¨i k~b¨¯’vb c~iY Ki|

1 UB Uz¤i 6 ‡VuvU KvUv

2 VvÛv jovB 7 Wvbv KvUv cix

3 Wz‡e Wz‡e cvwb LvIqv 8 wX‡g †ZZvjv

4 Zv‡mi Ni 9 wZj‡K Zvj Kiv

5 Zzwo †`Iqv 10 Zx‡_©i KvK

1 ag©N‡Ui Kvi‡Y hvb PjvPj eÜ _vKvq †jvKRb wiKkvi Rb¨ gZ e‡m Av‡Q|

2 Av‡gwiKv I ivwkqvi g‡a¨ me mgqB †j‡M _v‡K|

3 mvwgbvi K_v †Zv hvq bv , Zvi K_viI hyw³ Av‡Q|

4 ‡h MwZ‡Z Mvwo Pj‡Q ,Zv‡Z g‡b n‡”Q evwo †cuŠQv‡Z mܨv n‡q hv‡e !

5 iwd‡Ki gZ Ggb †jvK Avwg Avi †`Lwb, †Kv‡bv KviY QvovB Avwmd‡K GZ¸‡jv

K_v ïwb‡q †Mj|

wb‡P †`Iqv Dchy³ evMaviv / cÖePb/ ‡Rvovk‡ãi msL¨vwU †e‡Q wb‡q cÖwZwU ev‡K¨i k~b¨¯’vb c~iY Ki|

1 Zz‡li Av¸b 6 `nig gnig

2 `v-Kzgov m¤úK© 7 bvK Mjv‡bv

3 bv‡Qvo ev›`v 8 bvwo bÿÎ

4 y‡ai gvwQ 9 cvKv av‡b gB

5 cvqvfvwi 10 cyKzi Pzwi

1 K‡jR Rxe‡bi eÜzi mv‡_ †`wL †Zvgvi GLb , gyL †`Lv‡`wL I eÜ|

2 Avwg wK †Zvgvi w`‡qwQ †h Zzwg Avgvi GZ eo ÿwZ Ki‡j !

3 wicv Avgvi wc‡Q n‡q †j‡M‡Q Zv‡K †KK evbv‡bv †kLv‡ZB n‡e !

4 cixÿvq cÖ_g n‡q jvweevi †ek n‡q‡Q, KvD‡KB Avi cvËv †`q bv|

5 eo mv‡n‡ei Abycw¯’wZ‡Z Kg©Pvix‡`i †ek †cvqvev‡iv n‡q‡Q , mK‡j wg‡j Ki‡Q|

Additional Mathematics

Class : IX

Staright line Graphs

1.

2.

3.

4.

5.

6.

7.

8.

Factors & Polynimial

1.

2.

3.

4.

5.

6.

Circular Measure

1.

2.

3.

4.

5.

6.

1

Magnetism & Electromagnetic induction Work sheet

Class IX Full marks-20 Name:……………………………………………………… Section………………… 1 The diagram shows a beam of electrons entering a magnetic field. The direction of the field is into the

page.

What will be the initial direction of the deflection of the electrons as the beam passes through the field? A into the page B out of the page C towards the bottom of the page D towards the top of the page 2 The diagram shows a two-pole single-coil electric motor.

The split-ring commutator reverses the current in the coil as it rotates.

How many times is the current reversed if the coil is rotated once?

A 1 B 2 C 3 D 4

3 Which statement about the action of a transformer is correct? A An alternating current always flows in the secondary coil when an alternating voltage is applied to the primary coil. B The current in the secondary coil is always larger than the current in the primary coil. C An e.m.f. is induced in the secondary coil when an alternating voltage is applied to the primary coil. D An e.m.f. is induced in the secondary coil when a steady direct current flows in the primary coil.

4. A current in a solenoid creates a magnetic field.

2

5. A copper wire is held between the poles of a magnet.

5.

6.

6. The diagram shows a coil in a magnetic field.

7.

3

1 Fig. shows a wire passing through a hole in a horizontal, plastic board.

The wire carries a current vertically upwards. A student moves a small compass around the board and

plots the magnetic field lines due to the current.

(a) (i) Draw a diagram of the board as seen from above and mark on it the magnetic field lines due to the

current. [3]

(ii) The current is increased. Describe how the magnetic field changes. [1]

(b) A 6.0 V power supply produces a current of 8.0 A in the wire. Calculate

(i) the total resistance of the circuit, [2]

(ii) the charge that flows through the wire in 2.0 minutes. [2]

4

(c) The north pole of a bar magnet is held on the left of the wire and the south pole of another bar

magnet is held on the right, as shown in Fig.10 2.

(i) State the direction of the magnetic field at the wire due to these two poles. [1]

(ii) The wire is flexible. Describe the effect of this magnetic field on the current-carrying wire. [2]

(iii) The current in the wire is now reversed. State the effect of this on the wire. [1]

(iv) Describe how this effect is put to use in a d.c. motor. [3]

Page 1 of 4

HURDCO INTERNATIONAL SCHOOL

Grade-IX

Chemistry

Worksheet on ‘An Introduction to Organic Chemistry’

Name: _____________________________________________, Roll:______, Grade: IX, Section: ___,

Date: ________/________/________ Total Marks: 50, obtained marks:

Organic compounds:

An organic compound is a member of a class of chemicals containing carbon atoms linked to each other

and to other atoms by covalent bonds and found in the cells of living organisms.

Hydrogen, oxygen and nitrogen are typical elements that make up organic compounds in addition to

carbon.

The few carbon-containing compounds not classified as organic include carbides, carbonates, and

cyanides.

Hydrocarbons:

An organic compound of hydrogen and carbon, such as any of those which are the chief components of

petroleum and natural gas. Examples: Methane, ethane, ethene etc

Non-hydrocarbon: Organic compounds which contain carbon, hydrogen and other elements. examples:

Alcohols, Carboxylic acid etc.

Homologous series:

In organic chemistry, a homologous series is a series of compounds with the same functional group and

similar chemical properties in which the members of the series differ by the number of repeating units

they contain. Examples: Alkane, alkene, alcohol etc.

Functional group:

A group of atoms responsible for the characteristic reactions of a particular compound known as

functional group. Example: Alkane’s functional group is C-, alcohol’s –OH etc.

General characteristics of homologous series:

a. They have the same functional group.

b. They have similar chemical properties.

c. There is a gradual change in their physical properties.

They differ in formula from one member to the next by one -CH2- unit

Page 2 of 4

Part-A: Write down answer of the following questions.

1. Write down five differences between organic and inorganic compounds: [5]

Organic compounds Inorganic compounds

2. What is hydrocarbon? [1]

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

3. What is a homologous series? Give examples. [2]

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

4. What is functional group? Give examples. [2]

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

5. What are the general characteristics of a homologous series? [3]

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

6. Name the functional group in each of the following organic compounds. [4]

Organic compound Functional group

a. Butanol

b. Propene

c. Ethanoic acid

d. Pentane

Page 3 of 4

7. Complete the table with appropriate information. [10]

Fraction Boiling

point range 0C

Number

of carbon

Uses

Petroleum gas

20-35

40-75

For paving road surfaces; for roofing.

9-16

Naptha

Diesel oil 220-250

8. Name the petroleum fraction in which the compounds have: [2]

a. The lowest boiling points.

b. The longest chain lengths.

9. Give the formula for the alkane containing 400 carbons. Answer: _________________ [1]

10. Give the formula for the alkane containing 50 hydrogens. Answer: ________________ [1]

11. Give the formula for the alcohol containing 40 carbons. Answer: _________________ [1]

12. Give the formula for the alkene containing 30 carbons. Answer: _________________ [1]

13. Give the formula for the alkene containing 80 hydrogens. Answer: _______________ [1]

14. Organic compounds name contains two parts: [1] a. Prefix: Number of carbon. Answer: _________________ [1] b. Suffix: Name of the homologous series. Answer: _________________ [1] 15. Complete the table. [5]

Number of Carbons Name Alkane Alkene

1 meth- methane X

2 eth- ethane

3 prop- propane

4 buta- butane

5 penta- pentane

6 hexa- hexane

7 hepta-

8 octa- octane

9 nona- nonane

10 deca- decane

Page 4 of 4

16. Draw the displayed formula of the following organic compounds: [3]

a. Nonane

b. Heptene

c. 2 methyl Pentane

17. Draw a diagram and explain how is petroleum separated in an oil refinery? [5]

Grade- 9

Subject: Biology Topic: Effect of human activity on the ecosystem Subject: Biology

What is water pollution?

Water pollution occurs when harmful substances, often chemicals or microorganisms, contaminate a

stream, river, lake, ocean, or other body of water, degrading water quality rendering it toxic to the

communities that live in such habitats.

Causes of water pollution:

1.Sewage: When untreated sewage discharge into rivers and lakes contain, bacteria feed on the sewage

and use up the oxygen in the water and the bacteria grow and multiply eventually using up the oxygen

in it. Thus, the fishes die in the rivers. These untreated sewages can cause diseases like cholera and

typhoid.

2.Inorganic waste: Some industries dump large amounts of waste products into rivers and streams.

These waste products may include poisonous metals such as mercury, arsenic and cadmium. This can

have detrimental effects on the fishes and eventually on the humans.

3.Fertilizers: Some fertilizers which are sprayed into crops sometimes can get washed away into rivers.

These fertilizers contain nitrates and phosphates which promote the growth of algae and green plants.

This is known as eutrophication. These algae and plants die due to lack of sunlight. These dead bodies

are decomposed by bacteria and use up the oxygen in the water. As a result, other organisms such as

fish die.

Read the pages (299-304), solve the question paper

Reproduction in Plants- Chapter 20

There are two types of reproduction: asexual and sexual reproduction.

What is asexual reproduction?

Asexual reproduction is the production of new individuals that does not involve fertilization, that is

there is no fusion of two reproductive cells called gametes. Sexual reproduction is reproduction that

involves the fusion of two gametes.

There are two types cells in general:

a. Somatic cell –Somatic cells are regular cells that form organism’s tissues and organs. Somatic cells of

sexual organisms have the diploid (46 chromosomes, this number is for humans, while the diploid

number can vary from species to species form example the diploid number for maize plant is 20

chromosomes) number of chromosomes, one set from each parent. Somatic cells undergo mitosis.

These somatic cells are also known as body cells.

Being diploid (2n) meaning these cells have two copies of each chromosome.

What is mitosis?

Mitosis is a process of cell duplication or reproduction during which one cell gives rise to two genetically

identical daughter cells. Through mitosis the genetic information is passed on. Mitosis only takes place

in normal body cells.

b. Gamete/sex cells- Gamete cells are cells which contain half the number of chromosomes (23 in case

of humans, and the maize plant has 10 chromosomes in its gamete cells). The gamete cells divide by

meiosis. This is known as the haploid number since the number of chromosomes are half. Gametes are

usually regarded as being either male (sperm) or female (egg).

Now the question is why the number of chromosomes are half in a gamete cell?

The reason is, the male and female gametes will fuse together during sexual reproduction which is

known as fertilization. By sexual reproduction a new organism is formed. Sexual reproduction provides

genetic diversity because the sperm and the egg contains different combinations of genes. Due to

genetic variation in sexual organisms each individual is different from another.

What happens when a plant reproduces asexually?

In asexual reproduction in plants there is only the involvement of one parent plant with its diploid

number of chromosomes. So the parent plant produces genetically identical offspring. The offspring is

genetically identical because mitosis takes place during asexual reproduction. During mitosis exact

copies of the parent cell is made to produce two daughter cells. These daughter cells are genetically

identical, have the same number of chromosomes and hereditary materials as the parent plant. Since an

exact copy of the parent plant is made, these genetically identical offspring are known as clones.

Offspring-In biology, offspring are the young born of living organisms, produced either by a single

organism in the case of asexual reproduction or, in the case of sexual reproduction, two organisms.

HURDCO International School

Biology Grade-ix

Name: ………………………………………………… Roll: ………………………… Section: …………….. Date: …..………..

Worksheet -1 on Effects of Man on the Ecosystem

Question 1

(a) (i) Describe the water cycle.

(ii) Explain how water may be polluted by agricultural practices.

(b) Explain why the following are recycled:

(i)household water

(ii) paper

(c) Suggest the problems which may arise when household water is recycled.

Question 2

(a) Describe the undesirable effects on the environment of

(i)Deforestation

(ii) Air pollution

(b) Explain the reasons for studying species that are threatened with extinction.

Worksheet-2 on Effects of Man on the Ecosystem

Question 3

(a) Explain the effects that sewage can have on rivers and seas.

(b) Describe the ways in which air may be polluted and the possible cconsequences.

Question4

Explain the advantages and disadvantages of the use of

(a) Nitrogen containing fertilizers

(b) insecticides

Page 1 of 2

HURDCO International School Worksheet Economics

Chapter: Firms, pg-175 (Susan Grant’s 2nd edition) “Economies of Scale and Diseconomies of Scale”

Economies of Scale

Economies of scale occurs when there average cost of production of a firm with the increase in its size.

In other words, Economies of Scale measures how a firm is performing or how efficient it is.

[Efficiency occurs when we produce maximum product, using minimum resources/cost]

EoS

-Internal (Occurs due to increase in firm’s size)

-External (Occurs due to increase in size of the industry, this firm belongs to)

Types of internal EoS: Types of external EoS:

1 Financial EoS 1. A skilled labor force

2 Technical EoS 2. Good Reputation

3 Risk Bearing EoS 3. Specialist Market

4 Purchasing EoS 4. Specialist suppliers

5 Marketing EoS

6 Managerial EoS

Fig1: Showing EoS/DoS using average cost of production.

Cost

EoS DoS

0 5 Output

Page 2 of 2

Explanation: As firm increases its output level, upto a certain level of output say ‘5’ its average cost decreases.

After output level ‘5’, the firm faces DoS and its average cost increases. Therefore, the firm needs to improve its

capacity e.g. purchase new fixed asset eg buy new factory space, new machinery, etc.

Diseconomies of Scale

It occurs when average cost of a firm increases with increase in its size. [The firm is performing inefficiently]

Types of internal DoS (Occurs due to increase in firm’s size):

Types of external DoS (Occurs due to increase in size of the industry, this firm belongs to):

1 Difficulties in controlling the firm 1. Increased competition for the resources

2 Communication problem 2. Higher transport cost

3 Poor industrial relation 3.Pollution

4. Higher commute time (delaying goods’ delivery)

Task:

1. Write explanation for each type of EoS (internal/external) and Dos (internal/external).

2. Discuss whether it is always beneficial for a firm to grow in size. (8)

HURDCO International School Bangladesh Studies

Class-IX Topic: Jasimuddin and Zainul Abedin

Name…………………………………………… Sec………………… Date…………………………………

A. Answer the questions

1. Who was Jasimuddin? 2. In which field did Jasimuddin contribute to the culture of Bangladesh? 3. Why is he called ‘Palli kabi’ (Poet of countryside)? 4. Why is rural life the main theme of his potery? 5. Name one of his famous poems which was included in text book. 6. Mention the name of his remarkable work? 7. Name two of his work which considered as unique in the terms of style. 8. Write about his most significant contribution in the field of folk culture. 9. Name Jasimuddin’s first book of verse which published in 1927? 10. Which award did he refuse in 1974?

Zainul Abedin

Q.1. Who was Zainul Abedin?

Q.2. When was Zainul Abedin born?

Q.3.Name the institute where Zainul Abedin joined as a teacher? Q.4. Which river inspired Zainul Abedin to paint a Series of water colour drawing? Q.5 . How many people were killed in the famine of 1943? Q.6. What did manpura represent? Q.7. What did Zainul Abedin receive for paintings in an all India exhibition? Q.8. Which institution was established by Zainul Abedin ? Q.9. Name the festival that he organized in 1970 at the Shilpakala Academy. Q.10. What was Zainul Abedin’s First famous large water colour scroll called? Q.11. What was the size of Nabanna painting? Q.12. What was the name of the award he achieved from government of Pakistan? Q.13. Why was Zainul Abedin given the title Shilpacharya? Q.14. What did Zainul set up in 1975 at Sonargoan? Q15. Which university awarded him D.litt degree? Q16. What was the characteristics of Zainul Abedin’s painting? Q17. Name one of the well known works of Zainul Abedin. Q18. What size was Manpura painting? Q.19. What was Zainul’s last painting? Q.20. When did Zainul die and where was he buried?

Name of the topic: Statistics . Cass-IX Maths-D Name of the student…………………………………

1.

2.

3.

4.

5.

6.