NILGIRI HILLS PUBLIC SCHOOL

HOLIDAY HOMEWORK(2018-19)

CLASS IX

Subject- Social Science

Prepare a project file with the following details:

1. The total length of the project should not be more than 15-20 written pages(A-4 Size) sheet.

2. The project should be handwritten with use of eco-friendly material.

3. The project report should be developed and presented in the order:

Cover page showing project title, student information, school and year.

Acknowledgements(person who have helped)

Details of the topics.

Summary & Conclusion

Bibliography(Author, publisher,website link which have been used)

Suggested Projects[Do any one]

i) Identify the different hazard that your area is prone to. Enumerate some ways through which the impact of these can be reduced.

ii) Mitigation strategy for natural disaster such as flood,earthquakes, landslides and cyclones.

OR

iii) Mitigation strategy for human induced disaster like nuclear accidents, chemical and industrial accidents and biological disasters.

Learn all the chapters done in Class.

Mathematics

Number System

1. Find few rational numbers between 1/3 and 4/5.

2. Find two irrational numbers between 2 and 2.5.

3. Express 1.32 + 0.35 in the form p/q, where p and q are integers and q0.

4. Prove that (3- )2 is an irrational numbers.

5. Find the square root of 4.5 geometrically.

6. Draw , and on a number line.

7. Evaluate ( + )2 - ( - )2

8. Find two irrational numbers between 0.1 and 0.2.

9. Rationalise the denominator of i. ii.

10. If x= 3+ 2 find x2 + 1/x2

11. If x = and y = find x2 + xy + y2

12. If ax = by = cz and b2 = ac then prove that y =

13. Find a and b if = a- b

14. Simplify + +

Polynomials

15. Examine whether x + 2 is factor of x3 + 3x2 + 5x + 6.

16. Find the value of k if (x-3) is a factor of k2x3- kx2 + 3kx k.

17. Factorise 6x2 + 17x + 5 by splitting the middle term.

18. If both (x-2) and (x- ) are factor of px2 +5x + r, show that p=r.

19. Without finding the cube, factorise (x 2y)3 + (2y z)3 + (z-x)3

20. If x = 3 + 8 find the value of x2 +

Lab manual activities

( Do these activities in Lab manual)

i. Construct a square root spiral.

ii. Verify the algebraic identity (a-b)2 = a2 2ab + b2

iii. Verify that the sum of the angles of triangle is 180.

iv. Verify the algebraic identity a3 b3 = (a b )(a2 + ab + b2)

COMPUTER

For the following situations advise which type of software you would use.

Typing a letter

Creating a graph

Keeping a list of telephone numbers

Creating a poster

Creating a original image

Editing a digital photograph

Reading a webpage on the Internet

Look in computer magazines for various input and output devices .

Make two columns in MS Word

Use the information given in the magazine to build the two columns

Gather additional information for input/output devices in the list

Figure out how many devices you have never seen.

Find out where can you find out these devices being used

Science

Do these Lab manual activities in the Lab manual

To study the third law of motion using two spring balances.

To prepare a true solution of common salt, sugar & alum.

To separate the components of mixture of salt and ammonium chloride.

To test the presence of starch in the given food sample.

CHAPTER CELL

Why does the skin of your finger shrink, when you wash clothes for a long time?

Name the cell organelle which is called kitchen of the cell, why is it so called. Explain giving reason.

Why DNA is called genetic material.

How does smooth ER differ from rough ER?

Draw a well labeled diagram of plant cell?

Why we cant use boiled egg for performing solution experiments?

Difference between Hypotonic and Hypertonic solution.

CHAPTER Matter in our surroundings

How does the water kept in an earthen pot become cool during summer?

Why are we able to sip hot tea or milk faster from a sauce rather than a cup

Why is ice burn on a burnt part of the skin?

Explain, why does steam causes more severe burns than boling water?

Discuss the role of pressure and temperature in the liquification of a Gas

With the help of a well labeled diagram. Explain how slid ammonium chloride converts directly to gaseous state on heating?

Archit dropped a crystal of KMNO4 in two beakers A & B containing hot water and cold water respectively. After keeping the beakers undisturbed for some time, what did he observe and Why?

CHAPTER -MOTION

A body is moving along a circular path of radius R, What will be the distance travelled and displacement of the body when it completes half a revolution?

A ball hits a well horizontally at 6m/sec. It rebounds horizontally a 4.4m/sec. The ball is in contact with the wall for 0.04s. What is the acc of the ball?

A car is moving on a straight road with uniform acceleration. The following table gives the speed of a car at various instants of time.

Time(s)

0

10

20

30

40

50

Speed(m/s)

5

10

15

20

25

30

Draw speed time graph & find

(a) The acceleration of car

(b) The distance travelled by car in 50sec.

ENGLISH LANGUAGE LAB

NOTE:

Parents are requested to encourage their wards to improve their linguistic skills.

All the work should be done very neatly.

1. Write an article on Importance of English Language. (Word limit: 150-200 words).

2. Write a story The Boy Who Cried Wolf in your own words and learn itand also give a moral to the story. (80-100 words)

3. Prepare a mini dictionary of 80 words with their meanings followed by sentences related to day to day life. (Each alphabet should carry at least 3 words)

( a ) energetic / a / should / highly / be / leader

( b ) frustration / capable / should / stress / good / a / be / and / leader / tolerating / of

( c ) example / lead / should / by / leader / a / good

( d ) effective / resilient / leader / should / and / be / self-confident

ENGLISH

Q1. Read the passage given below and answer the questions that follow:

In these trying times, when buying ordinary food stuff can burn a hole in your pockets, comes the news

that can actually help us save some hard cash when we go out to shop the next time. According to a

Stanford University study, the first of its kind in th e world, there is no evidence to suggest that there are

more nutritional benefits from expensive organic food than those grown by conventional methods. The

researchers add that there is no difference in protein and fat content between organic and conventio nal

milk and the vitamin count is similar in both types. The only benefit is that organic foods are not

contaminated with pesticides but then before you chew on the plate of organic okra with roti made

from organic wheat, they are not 100% pesticide free e ither. In India, organic food has been growing at

20-22% and the export market is valued at Rs. 1,000 crore. Obviously, the study is not good news for

that sector and for people who are big on organic food.

In India, eating organic food is more of a style statement than due to health worries because the stuff is

expensive. But people who can, do indulge in not only organic vegetables but even organic eggs laid by

'happy hens', who are allowed to roam around freely whereas 'unhappy hens' are kept in coops. Then

there are companies that have installed music channels in their cowsheds and the milk from those sheds

are sold at a marked up price since it has more nutritional value because the animals are happy thanks

to lilting 247 music. We don't know yet any farmer using music to improve his crop quality, but then

you never know: plants are known to respond to music.

Why such pickiness about food ? These days, the huge number of TV shows and articles that we see and

read on food provide bread and butter for t he specialist. But instead of decoding food, its sources and

what has gone into growing it, isn't it much better to enjoy what's on the plate ?

1.1. Answer the following questions.

(a) According to a Stanford University study, organic food in relation to conventional food is________

(b) The study will not be welcomed by _________.

(c) We can save some hard cash by ______ ___.

(d) Music channels are installed in the cowshed because the _________.

(e) In the second paragraph, the author's attitude to the people who eat food sourced from

'happy' animals is that he ___ ______.

(f) One benefit of organic food is that __________.

(g) The word 'contaminated' means ________.

(h)The word Gratify means__________.

. Write a short story, in about 200 -250 words, with any one set of the cues given in the boxes

below. Give a suitable title to the story.

Ram Singh cultivated wheat in his field for a living. He was never worried about arranging

money for his daughters as he believed in his ability in working hard ---------------

. Rearrange the following word clusters to make meaningful sentences. (1x 4=4 marks)

ENGLISH

Q1. Read the passage given below and answer the questions that follow:

In these trying times, when buying ordinary food stuff can burn a hole in your pockets, comes the news that can actually help us save some hard cash when we go out to shop the next time. According to a Stanford University study, the first of its kind in the world, there is no evidence to suggest that there are more nutritional benefits from expensive organic food than those grown by conventional methods. The researchers add that there is no difference in protein and fat content between organic and conventional milk and the vitamin count is similar in both types. The only benefit is that organic foods are not contaminated with pesticides but then before you chew on the plate of organic okra with roti made from organic wheat, they are not 100% pesticide free either. In India, organic food has been growing at 20-22% and the export market is valued at Rs. 1,000 crore. Obviously, the study is not good news for that sector and for people who are big on organic food.

In India, eating organic food is more of a style statement than due to health worries because the stuff is expensive. But people who can, do indulge in not only organic vegetables but even organic eggs laid by 'happy hens', who are allowed to roam around freely whereas 'unhappy hens' are kept in coops. Then there are companies that have installed music channels in their cowsheds and the milk from those sheds are sold at a marked up price since it has more nutritional value because the animals are happy thanks to lilting 247 music. We don't know yet any farmer using music to improve his crop quality, but then you never know: plants are known to respond to music.

Why such pickiness about food ? These days, the huge number of TV shows and articles that we see and read on food provide bread and butter for the specialist. But instead of decoding food, its sources and what has gone into growing it, isn't it much better to enjoy what's on the plate ?

1.1. Answer the following questions.(a) According to a Stanford University study, organic food in relation to conventional foodis________ (b) The study will not be welcomed by _________.(c) We can save some hard cash by _________. (d) Music channels are installed in the cowshed because the _________. (e) In the second paragraph, the author's attitude to the people who eat food sourced from 'happy' animals is that he _________.(f) One benefit of organic food is that __________.(g) The word 'contaminated' means ________.(h)The word Gratify means__________.

. Write a short story, in about 200-250 words, with any one set of the cues given in the boxes below. Give a suitable title to the story.

Ram Singh cultivated wheat in his field for a living. He was never worried about arranging money for his daughters as he believed in his ability in working hard ---------------

. Rearrange the following word clusters to make meaningful sentences. (1x 4=4 marks)

( a ) energetic / a / should / highly / be / leader

( b ) frustration / capable / should / stress / good / a / be / and / leader / tolerating / of

( c ) example / lead / should / by / leader / a / good

( d ) effective / resilient / leader / should / and / be / self-confident