Ghaziabad Public School
Holiday Homework - 2015
Class – XIIth SCI
GUIDELINES
1. Summer vacation is here with all the fun and frolic. Apart
from enjoying we want our students to keep in touch with
their studies, so let’s explore the world knowledge in a
different way with these assignments
2. The holiday home work should be done as specified by the
subject teacher.
3. Written Assignment will be done in Home Work copy.
4. Manage your time in such a way that a little work is done
every day to avoid piling it for the last moment. Keep a
fixed a time for doing it every day.
5. Collect the material required for the work in advance.
6. All the holiday home work must be submitted by or before
6th July. The work submitted later shall not be marked.
7. It is compulsory to complete HHW, there will be internal
marking in all assignments that will be add in FA 2 Result .
Happy
Holiday
Enjoy your Vacation
andSummer
have a Great
Time with your
family!!!
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CLASS
XII SCI
Holiday Homework -2015
English
Revisions of Lesson’s question/answer and write down the summary of all chapter in their notebook.
1. The Last Lesson
2. Lost Spring
3. Deep Water
4. The Tiger King
5. The Enemy
6. Should Wizard Hit Mommy?
Poetry:
1. My Mother at Sixty-Six
2. An Elementary School Classroom in a Slum
3. Keeping quiet
20 Phrase needs to be written and remember to be used in English communication
Grammar: Format of Notice, Comphresion/Unseen passage, Note-making Practice And Article writing and one
Notice and Article on Current should be in student’s notebook.
Q.1
Q.2
Q.3
1.
2.
3.
Read the novel ‘Invisible Man’.
Write summary of the novel ‘Invisible Man’.
Write any two article on following:
Importance of Books
Global Warming
Impact of Cinema and T.V. on young minds.
Physics
Investigatory Projects- Physics
As per C.B.S.E. guidelines, all students have to prepare one Investigatory Project carrying 30 marks. All
students are therefore, advised to prepare one Investigatory Project on any one of the following topics:
POINTERS FOR MAKING PROJECT REPORT
The material should be placed and bound in the following order:
1. Top Sheet of transparent plastic –The top page of your report should carry the following information in printed
form or handwritten in neat block letters:
Title of Project:
Name of Student:
Roll Number:
Date of submission:
2. Aim of Project
3. Apparatus required
4. Principle/theory
5. construction with labeled diagram,
6. Working
7. Observations
8. calculations,
9. Result/ Conclusions
10. Applications,
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CLASS XII SCI
Holiday Homework -2015
11. Graphs if any,
12. References/bibliography
13. Back cover of plastic: may be opaque or transparent
List of Investigatory Projects
1. To study Van de Graff generator
2. To study capacitor and various types of capacitor
3. To study Gold leaf electroscope.
4. To study Gauss law and their application
5. To study the resistivity of various material
6. To study wheatstone bridge and their practical application
Chemistry
Make an analytical project on any one of the following topics1. Semiconductors and their application
Or
2. Co - ordination number related to solid state
Or
3.Crystal lattice in solid state.
The project must be informative, creative and application based with new ideas.
Math
Q.1. Prove that the relation R on the set of rational numbers Q defined by (a,b)
Q.2. Prove that the relation “ congruence modulo m” on the set z, of all integers is an equivalence relation.
Q.3. Let * be a binary operation defined by x * y =
Q.4. Let f(x)
.
Q.5. Let
. Evaluate :
Q.6. Evaluate : cos
Q.7. If α =
.
β=
.
Q.8. Write the principal value of
).
Q.9. If
Q.10. If
α, Prove that
.
Q.11. If X and Y are two matrices such that X+Y and XY are defined. Show that X and Y are square matrices of the
same order.
Q.12. Express
as the sum of symmetric and skew – symmetric matrix.
Q,13. If A and B are two square matrices of same order such that AB = BA , then prove by Mathematical Induction
that
Let A =
,B=
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CLASS XII SCI
Holiday Homework -2015
Q.14. By using elementary row transformation, find
.
Q.15. Let A be 6x7 matrix , then each column of matrix has how many elements ?.
Q.16. If a,b,c, are positive and unequal, show that the value of determinant
Q.17. If A =
, find det
.
Q.18. Given A=
Q.19. Show that the matrix: A =
Q.20. Find all values of K ( K is an integer ) for which the system of equations :
Q.21. Find the points of discontinuity of the function defined by
.
Q.22. If the function f defined by
Q.23. For what value of a and b the function
.
Q.24. Find all the points of discontinuity of the function f given by
Q.25. If Y
Q.26. (i) Let
(ii) Differentiate
,
Q.27. Make a Project of some important results & Properties of chapter 1 to 5 .
Biology
The vacations would be the best time to prepare an investigatory project on the topic of your choice.
The project is a mandatory part of your board practical examination which the external examiner is
going to assess at the time of practical examination. So, complete it well in advance and submit the
first draft in July. It will be read and critically evaluated for the feedback so that necessary changes
could be made before the final draft.
Q1. Identify the topic and complete an investigatory project for class XII Practical
Exam. Make a hand written project report in the correct format, with the necessary pictures, diagrams, etc.,
and submit the same on 1st Week of July.
Here are a few topics to give you an idea
If you are preparing the project on a disease write about its prevention, medication and cure too.
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CLASS XII SCI
Holiday Homework -2015
1. A study on HIV Aids – Talk about the disease, the virus – go in details. Include a Case study.
2. How Hair Colors and Dyes Affect your hair – Conduct experiments on how different hair colors
and dyes affect hair. Point out the difference between ammonia included and ammonia free
hair dyes.
3. Cigarettes are harmful – Do tests on various tobacco products and list out
their harmful effects. Do a Case Study.
4. Cancer – Do a general overview first, then choose a particular cancer and write in detail. do a
Case Study.
5. Pulmonary Tuberculosis – Explain the disease. Do a Case Study.
6. Noise Pollution and its effect on ears – Study and show how ears react to different
decibels of sound. What sound levels are acceptable? Do a case study, if possible.
7. Eye Cataract – Explain the disease and do a case study.
8. Ovarian Cyst – Explain the disease and do a case study.
9. Blood - Explain the different components in detail. Pick a disease related to it and do a case
study.
10. Tea leaves/Coffee addiction – Explain how tea leaves/coffee beans cause addiction and their
effects. Do a filter test. If possible, do a case study.
11. DNA Fragments used in forensics – Explain how DNA fragments help solving crime. Do a case
study. Study apical dominance in potato and coleus
12. Study of pollen structure and calculation of pollen viability.
13. To study dispersal of seeds by various agencies.
14. Study the effect of avenue trees on temperature under canopy and outside.
15. Study of coaguable and non-coaguable milk proteins.
16. Study of pollination in sunflower and legume.
Here are a few more tips to secure the extra marks  Please make sure you write the project yourself (this fetches you extra marks),
rather than a print out
 A good project (including case study) should consist of 20+ pages.
 Paste as many graphs, pie charts , diagrams and photographs regarding the topic as possible.
Make it look appealing.
 Make sure that you understand the project really well, because you will need score good
on
the viva too. A great project and a poor viva will spoil the show.
 Think 5-10 questions about your project, which you think the examiner can ask you
and prepare them well.
Q2. .Make a PPT of any two chapters from I Unit test of your own choice.
Q3. Do all practical’s in a practical file.
Computer Science
Q1. Construct the logical expression to represent the following conditions:
1. Either age is more than 70 or members are more than or equal to 8
2. Grade is ‘b’ and exper is more than 3 yrs.
Q2. Write a program in C++ with classes to find the factorial of a given number.
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CLASS XII SCI
Holiday Homework -2015
Q3 what is wrong with this code:
5?
:
.
Cin>>a;
If(a=5)
Cout<<”five”;
Else
Cout<<”not five”;
Q4. Explain the impact of access modifier const over variables. Support your answer with examples.
Q5. Write a c++ program that uses area function for calculating area of a triangle or rectangle or a
square?
Q6 compare a structure and a class in c++ context.
Q7 what is the difference between private ,protected & public?
Physical Education
1. Prepare a project file on Volley ball
2. Revise all syllabus of I Unit Test
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CLASS XII SCI