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DAV PUBLIC SCHOOL,EAST OF LONI ROAD, DELHI-93
HOLIDAY HOMEWORK
Class IX
Science
BIOLOGY
General Intructions:
Submit all your work in a proper folder.
Creativity And Originality Of The Work Will Be Appreciated.
Practice the questions related to chapter 5 of the book.
Do the following worksheet neatly on A4 size sheets.
Make the plant cell and animal cell using waste material .
Chapter 5
The fundamental unit of life
Q1) Fill in the blanks:-
1. ______________ and __________ are the examples of unicellular
and multicellular organisms.
2. __________ is the structural and functional unit of life.
3. Plasma membrane is made up of ____________ and
______________.
4. Organisms with primitive nucleus are called as
__________________ while the organisms with
well defined nucleus are called as ________________.
5. The function of SER is to synthesis ______________ while that
of RER is to synthesis
_______________.
6. The jelly like content of the cell enclosed by the plasma
membrane is ________________.
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7. ____________________ is the waste disposal system of the
cell.
8. __________________ is the power house of the cell.
9. ___________________ is the kitchen of the cell.
10. Mostly vacuoles are _______ sized in animal cells while
plant cells have ___________ vacuoles.
Q2) Name the organelle that contain genetic material.
Q3) Why are lysosomes called as suicidal bags?
Q4) Name the three types of plastids and the functions they
perform.
Q5) Expand : RER , SER , DNA , ATP , ER
Q6) Shape and size of cells are related to the function they
perform. Explain with example.
Q7) A special process helps in the intake of oxygen inside the
cells and release of carbon dioxide from
the cells . name the process.
Q8) Define osmosis and plasmolysis.
Q9) Amoeba is able to engulf its food due to the flexibility of
the cell membrane . what is this process
called as?
Q10) Egg membranes from three eggs were carefully taken out and
labeled as A, B and C. each of these
membranes were filled with 1% solution of sugar . membrane A was
immersed in 0.5 % sugar solution ,
membrane b was immersed in 1 % sugar solution and membrane C was
immersed in 2% sugar solution .
predict the behavior of the three membranes.
Q11) Give the functions of the following:
a) Cell wall
b) Cell membrane
c) Nucleus
d) Mitochondria
e) Golgi apparatus
f) Lysosomes
g) Plastids
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h) SER
i) RER
j) RIBOSOMES
Q12) State the similarity between mitochondria and plastids.
Q13) Name the substances stored in vacuole.
Q14) What is the percentage of plant cell volume does the
central vacuole occupy?
Q15) Complete the following table:
Organelle Plant/Animal/Both Function
Cytoplasm
Vacuole
Ribosome
Rough ER
Smooth ER
Central Vacuole
Nucleus
Nucleolus
Nuclear membrane
Centrosome
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Lysosomes
Microtubules
Nuclear pores
Multiple choice questions based on practical skills:
Temporary mount
Q1) In order to locate the specimen under the compound
microscope the objective lens to be used is
a) 10X
b) 40X
c) 100X
d) Fine adjustment and 40 X
Q2) If the power of eyepiece is 10X and that of objective lens
is 40X , then the total magnification of
microscope will be
a) 10X
b) 400X
c) 100X
d) 4X
Q3) While preparing the temporary mount of cheek cell the tissue
that is scrapped from the inner side of
cheek is :
a) Epithelial tissue
b) Muscular tissue
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c) Connect6ive tissue
d) Nervous tissue
Q4) The stain used in preparing temporary mount of cheek cell
is
a) Glycerine
b) Safranine
c) Water
d) Methylene blue
Q5) Which of the following organelle is visible in the temporary
mount of cheek cell
a) Nucleus
b) Mitochondria
c) Golgi body
d) Lysosomes
Q6) To avoid air bubble during the prepration of temporary slide
one should
a) Use needle to place the cover slip
b) Allow the slide to fall gently on the cover slip
c) Remove air bubbles using the brush
d) None of the above
Q7) After staining onion peel for 2 3 minutes what will be the
colour of the peel
a) Colourless
b) Red
c) Blue
d) Yellow
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Q8) The stain used in preparing temporaray mount of onion peel
is
a) Glycerine
b) Safranine
c) Water
d) Methylene blue
Q9) Which of the following organelle is visible in the temporary
mount of onion peel
a) Nucleus
b) Mitochondria
c) Golgi body
d) Lysosomes
Q10) Use of brush in preparing temporary mount of onion peel
is
a) To paint the peel
b) To transfer the peel
c) To remove the air bubble
d) To clean the slide
Q11) Microscopic observation of onion peel shows nucleus at the
periphery the reason for this is
a) Large nucleus
b) Large vacuole
c) Lack of cytoplasm
d) Improper staining
Chemistry
A) DO THE FOLLOWING QUESTIONS IN CHEMISTRY NOTEBOOK:
Q1: A sample of water under study was found to boil at 1020C at
normal temperature and
pressure . Is the water pure? Will this water freeze at 00C?
Comment.
Q2: Osmosis is a special kind of diffusion. Comment.
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Q3: Classify the following into osmosis/diffusion.
a) Swelling up of raisins on keeping in water.
b) Spreading of virus on sneezing.
c) Earthworm dying on coming in contact with common salt.
d) Preserving pickles in salt.
e) Shrinking of grapes kept in thick sugar syrup.
f) Aquatic animals using oxygen dissolved water during
respiration.
g) Spreading of smell of cake being baked through the house.
Q4: Water as ice has a cooling effect whereas water as steam may
cause severe burns. Explain
these observations.
Q5: Alka was making a tea in kettle. Suddenly, she felt intense
heat from the puff of steam
gushing out of the spout of kettle. She wondered whether the
temperature of the steam was
higher than that of boiling water in the kettle. Comment.
Q6. (a) Conversion of solid to vapour is called sublimation.
Name the term used to denote the
conversion of vapour to solid.
(b) conversion of solid state to liquid is called fusion. What
is meant by latent heat of fusion?
Q7. It is hot summer day. Priyanshi and Ali are wearing cotton
and nylon clothes respectively.
Who will be more comfortable and why?
Q8. You want to wear your favourite shirt to a party, but the
problem is that it is wet after a
wash. What steps will you take to dry it faster?
Q9. Comment on the following:
(a) Evaporation produces cooling.
(b) Rate of evaporation of an aqueous solution decreases with
increase in humidity.
(c) Sponge though compressible is a solid.
B. ACTIVITY:
(a) To compare the rate of evaporation of petrol, water and
acetone.
(b) To compare the rate of sublimation of camphor, naphthalene
and odonil.
Observe the change in mass, size and shape throughout the day
after every 4 hrs.Tabulate your
observations on a separate sheet.
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PHYSICS Do the work in physics note book
1. REVISE the chapter MOTION.
DO THE FOLLOWING ASSIGNMENT
1. A particle is moving in a circular motion with radius r .the
displacement after half a circle would be:
(a) 0 (b) 3.14 r(c) 6.28r (d)2r
2. Define speed.what is SI unit of speed?
3. A car is moving along a straight road at a steady speed. It
travels 150m in 5seconds
(a) What is average speed ?
(b)How far does it travel in 1 second?
(C) How long does it travel in 6 seconds?
4. Draw a distance time graph for
a) uniform motion.
(b) non uniform motion
(c) body at rest
5. Differentiate between scalar and vector quantity.
6. Derive the equations of motion by graphical method.
ACTIVITY
Enlist types of motion. Along with the examples and past the
related pictures in the note book.
ENGLISH
Seperate A-4 size ruled sheets.
Assesment will be done on the following parameters.
presentation
content and expression
usage of vocabulary,phrases,idioms and proverbs
originality
WRITING SKILLS
Q-1 You are Akshit/Akshita , a class 9 student of New Horizons
Public School. You have been
asked to give a speech in morning assembly on the benefits of
games and sports. You feel that
participation in sports and games helps an individual to develop
in a healthy way. Sports not only
provide physical exercise they also develop qualities of
willpower, courage and endurance as
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well a co-operation and team spirit. Write your speech in about
200 words to encourage students
to participate actively in sports and games.
Q-2 Write a debate either in favour of or aganist the
motion,"The main aim of education is to
prepare students for a career."
Q-3 IT had happened again. Despite all his efforts, Sachin was
late for school for the third time
that week. .......
Complete the story in about 200 words. You could use some of the
phrases given below:
Sincere efforts
Genuine reason
But quite unbelievable
Knees shaking and voice quivering
Utmost relief
Prepare the following assigned topics for speech activity to be
held after vacation and write the
same in a separate loose sheet of A4 size ruled sheet in neat
and presentable way:-
Roll No- 1&2 Role of education in ones life
Roll No 3&4 My remarkable adventurous journey/life is an
adventure face it
Roll No 5&6 Empowering girl child is the best way to empower
nation
Roll No 7&8 Working and educated mothers are more supportive
in the progress of nation
Roll No 9&10 Pollution A big hazard
Roll No 11& 12 Flood,Tsunami,drought are they man made or
natural disasters?
Roll No 13 & 14 Development & progress should not be at
the cost of natures destruction.
Roll No 15 & 16 Road rage in youngsters
Roll No 17 & 18 Child Labour- A menace
Roll No 19 & 20 Sports should be mandatory in school
curriculum
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Roll No 21 & 22 Advantages and disadvantages of science
Roll No 23 &24 Your little care can save the environment
R0ll No 25& 26 Electronic revolution has killed the pleasure
of reading
Roll No 27& 28 who is a true Indian?
Roll No 29&30 Are we happier than our forefathers?
Roll No 31 &32 nature is full of bounty and beauty, to
protect this is every citizens duty
Roll No 33& 34 Television is the leading cause of violence
(favour/ against)
Roll No 35 & 36 Fortune favours the brave
Roll No 37 & 38 Safer the environment healthier the life
Roll No 39 & 40 The role of media in society
Roll No 41& 42 Degrading moral values in new generation
Roll No 43 &44 How do we make the world a better place to
live
Roll No 45 &46 Terrorism a serious threat to nation
Roll No 37 & 48 importance of skill based study
Roll No 49 onwards------ importance of discipline and time in
ones life
Assessment parameters:-
An Impressive introduction
Richness of vocabulary used
Content and expressions
Time limit 3 minutes
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SOCIAL SCIENCE
GEOGRAPHY
We cannot stop natural disaster but we can arm ourselves with
knowledge so many lives
wouldnt be lost if there is enough Disaster Preparedness keeping
the above statement in
mind prepare a project on disaster management with the help of
information given below.
1. Define the term Disaster.
2. List the type of disasters.
3. Choose any one topic among the following
a) Earthquake
b) Flood
c) Drought.
Instructions. 1. Write the causes, dos and donts of the selected
disaster along with its
Mitigation strategies.
2. Support your project with adequate pictures.
3. Your project should not exceed 5 pages.
Revise the chapter done In class.
ECONOMICS
1. . Revise the chapter the story of Village Palampur
2. Collect any five information from the newspaper regarding the
steps taken by the
government for improving the conditions of people living in
rural india(focus mainly on
eradication of poverty in villages specially farmers.)
3. Farmers of Tamil Nadu are agitating in Delhi. Write in
200-300 words expressing their
agony and problems.
Instructions. 1.) Your project should not exceed 5 pages.
2. Support your project with adequate pictures.
HISTORY
1. Revise the chapter Nationalists movements in Indo-China.
2. Collect information of any two nationalist leaders of Vietnam
and write their contribution in
independence of Vietnam. Also paste their pictures.
3. Choose any three tourist place of Vietnam and paste their
pictures. Write information (best
months to visit, specialty about the place etc.) about the
tourist places.
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Instructions (i) Your project should not exceed 5 pages
(ii) Support your project with adequate pictures
MATH
Do the following activities in LAB MANUAL file.
Activity 1- To construct a square root spiral
Activity 2- By paper cutting and pasting, verify if two lines
intersect each other then vertically
opposite angles are equal.
Activity 3 - By paper cutting and pasting, verify that the sum
of interior angles of a triangle is
180 degrees.
Do the following worksheet in ASSIGNMENT register
Q1. Find four rational numbers between
.
Q2. Represent on the number line.
Q3. Express the following in the form of
, where p and q are integers and q 0.
i. 0.235
ii. 15.712121212..
Q4. Find one irrational number 2015 and 2016.
Q5. If x = 2 + , find the value of
.
Q6. Evaluate after rationalizing the denominator of
, it is given that and
.
Q7. Evaluate:
Q8. Simplify:
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Q9. Write the degree of the polynomial .
Q10. Find the value of k, for which the polynomial has 3 as its
zero.
Q11. If the polynomial is divided by , it leaves a
remainder 10. Find the value of a.
Q12. Divide by and verify the division algorithm.
Q13. Factorize
i.
ii.
iii.
Q14. If
find the value of
.
Q15. Evaluate 106 x 94 by using suitable identity.
Q16. If and , find .
Q17. In which quadrant or axis do these points (6,5), and
(-3,50)
Q18. Plot the points P( -1, 0), Q ( -1,1) and R (2,3) on the
graph paper and check whether they
are collinear or not.
Q19. Plot the points P(1,0), Q(4,0) and S(1,3). Find the
co-ordinates of the point R such that
PQRS is a square. Also, find the area of the square.
Q20. Locate and write the coordinates of a point:
a. above x- axis lying on y-axis at a distance of 5 units from
origin.
b. below x- axis lying on y-axis at a distance of 3 units from
origin.
c. lying on x-axis to the right of origin at a distance of 4
units.
d. lying on x-axis to the left of origin at a distance of 2
units.
Q21. Find a and b so that
=
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iii)
=
Q22. If x=
, find the value of 4x
3+2x
2-8x+7.
Q23. If p and q are remainders when the polynomials x3+2x
2-5ax-7 and x
3+ax
2-12x+6 are
divided by (x+1) and (x-respectively and if 2p+q=6 find the
value of a.
Q24. Find the value of b if x3-bx
2+3bx-b is exactly divisible by (x-3).
Q25. Factorise 33a3-b
3-55c
3-315abc.
Do NCERT EXEMPLAR of chapter 1, 2 and 3 in ASSIGNMENT
register.
INFORMATION TECHNOLOGY
Do the following worksheet in A4 size sheet:-
1. What are the various applications of computers in the field
of entertainment?
2. Do you think computer system can be applied in the field of
manufacturing? Why?
3. List all the electrical and digital devices that you see
around you and identify whether the
device has been resulted from any type of technological
convergence. Conduct a research on all
the devices, and make a report, describing the features and
functionalities of all the devices.
4. List the technologies that have emerged as a result of two or
more technologies.
5. Make a list of different generations of CPUs and their year
of release.
5. Collect the information on following topics :
Roll no.1-8 .Future of Mobile Commerce
Roll no. 9-16 Cloud Computing .
Roll no. 17- 24 4-G and 5-G Technology
Roll no. 25 32 Plagiarism Detection Technology
Roll no. 33 - 40 Cyber Terrorism
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Roll no. 41 48 Blue tooth Technology
Roll no . 49 51 Phishing
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