PRINCE PUBLIC SCHOOL

SECTOR-24, ROHINI

SUMMER VACATION HOMEWORK (2019-20)

XII-SCIENCE

Some points to remember

• Holiday Homework will be assessed on the basis of creativity and your efforts.

• Enhance your speaking skills and vocabulary by conversing in English with your family and friends.

• Read famous fictions, update yourself with current events by reading newspaper and listening to

the news daily.

• Schedule your time for activities so that there is no piling up for the last moment.

• Practice being a change by contributing to the community by sharing your knowledge.

• Visit an orphanage, old age home or try to impart literacy to at least one person in your surroundings.

Dear students,

As we have embarked on our journey in this new session, the most awaited time of

the year has arrived. Time to relish summer delicacies, rejuvenate our mind and

body, rethink and recreate our potentials. Life is all about climbing mountains and

fording streams. In these longer days and shorter nights when you spend your time

with favorite music and best friends, give space to creativity and honing skills.

Ignite the spark of your imagination and spend time purposely, for dreams only

become reality when efforts are made for achievement.

ENGLISH

Q1. Draft an invitation for school farewell ‘ALOHA 2019-20’ on a colored pastel sheet. Make it as attractive as possible and paste in your English notebook.

Q2. Write a computerized job application providing a cover letter and your bio-data for the post of a/an Mechanical Engineer/ Company Secretary/ Neurologist/ PGT English/ Marketing Executive. Attach it in the English notebook.

Q3. Recently you went to you native village to visit your grandparents. You saw that some of the children in the age group 5-14 (the age at which they should have been at school) remained at home, were working in the fields or were simply loitering in the streets. Write a letter in 120-150 words to the editor of a national daily analyzing the problem and offering solutions to it.( ref.:- Lost Spring)

Q4. Write a report on the recent Election results to be published in a national daily.

Q5. Write an article on the great saying by Roosevelt ‘All we need to fear is fear itself’, in not more than 150-200 words.

Q6. Identify a pressing social problem. Think of an innovative product to solve that problem. Design a poster to create awareness about this product using a snappy slogan.

Q7. Read a news article of your choice everyday. Identify at least 2 new words from the article. Write the words and their meanings in your vocabulary notebook. Also express the read article in your own words.

Q8. Complete list 1 to 6 of the Thematic Vocabulary in your vocabulary notebook.

Q9. Revise the syllabus covered till date.

PHYSICS

Q1. Complete the following in the class notebook.

Q2. How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced by red light ? Give reason.

Q3. Why does sun appear red at sunrise and sunset ? Q4. A concave lens of refractive index 1.5 is immersed in a medium of refractive index

1.65. What is the nature of the lens ? Q5. Why does bluish colour predominate in a clear sky ? Q6. A bioconvex lens made of a transparent material of refractive index 1.25 is immersed

in water of refractive index 1.33. Will the lens behave as a converging with itself. What is the focal length of the lens ?

Q7. A convex lens is placed in contact with a plane mirror. A point object at a distance of 20 cm on coinciding with itself. What is the focal length of the lens ?

Q8. Write the relationship between angle of incidence i, angle of prism A and angle of deviation 𝛿m for a triangular prism.

Q9. Under what condition does a biconvex lens of glass having a certain refractive index act as a plane glass sheet, when immersed in a liquid ?

Q10. A convex lens of focal length 25cm is placed coaxially in contact with a concave lens of focal length 20cm. Determine the power of the combination. Will the system be converging or diverging in nature ?

Q11. A convex lens of focal length f1 is kept is kept in contact with a concave lens of focal length f2.

Find the focal length of the combination.

Q12. When monochromatic light travels from a rarer to a denser medium, explain the following, Giving reasons. a) Is the frequency of reflected and refracted light same as the frequency of incident

light ? b) Does the decrease in speed imply a reduction in the energy carried by the light

wave? Q13. a) Define total internal reflection. Write necessary conditions for it. b) What is relation between reflective index and critical angle ?

NOTE : Complete Physics Project Work as specified to all students.

CHEMISTRY

Q1. Visit to pharmacy in your locality and ask name of the different drugs in his shop and

categorize them as antacid, tranquilizers, analgesic, narcotics, non narcotics,

barbiturates. Make the list of uses of these drugs for the treatment of diseases. Make a

project file on “Drugs” followed by the following contents i.e introduction, objective,

methodology, collected information in tabular form, result and analysis and

conclusion.

Paste pictures to make your project file more presentable and attractive.

Q2. Make a project file on scientific investigations involving laboratory testing and collecting information from other sources. A few suggested projects.

Roll No. NAME OF INVESTIGATORY PROJECT ASSIGNED

(1-5) Study of the presence of oxalate ions in guava fruit at different stages of ripening.

(6-10) Study of quantity of casein present in different samples of milk. (11-15) Preparation of soybean milk and its comparison with the natural milk

with respect to curd formation, effect of temperature, etc. (16-20) Study of the effect of Potassium Bisulphate as food preservative

under various conditions (temperature, concentration, time, etc.

(21-25) Study of digestion of starch by salivary amylase and effect of pH and temperature on it.

(26-29) Comparative study of the rate of fermentation of following materials: wheat flour, gram flour, potato juice, carrot juice, etc

The above project must have the following contents. a) Certification of authenticity b) Acknowledgment c) Objective d) Content e) Introduction f) Theory g) Apparatus h) Chemical required i) Observation table and Inference j) Result k) Conclusion l) Bibliography

MATHEMATICS Q1. Revise the following chapters.

Chapter 1 Relations & Functions. Chapter 2 Inverse trigonometric functions.

Chapter 3 Matrices.

Chapter 4 Determinants.

Chapter 5 Continuity and Differentiability.

Q2. Do any five sample papers based on following chapters in your practice notebook. Chapter 1 Relations & Functions. Chapter 2 Inverse trigonometric functions. Chapter 3 Matrices. Chapter 4 Determinants. Chapter 5 Continuity and Differentiability.

Q3. Do the miscellaneous exercise based on following chapters in your practice notebook.

Chapter 1 Relations & Functions. Chapter 2 Inverse trigonometric functions.

Chapter 3 Matrices.

Chapter 4 Determinants.

Chapter 5 Continuity and Differentiability.

Q4. Complete the Enrichment sheet (PPSR/ES/MAY19/02) based on Inverse

trigonometric functions in your classwork notebook.

Q5. Complete the following math activities in the lab. manual.

Activity 1 - To verify that the relation R in the set L of all lines in a plane, defined by

𝑅 = { 𝑙, 𝑚 ∶ 𝑙 𝑖𝑠 𝑝𝑒𝑟𝑝𝑒𝑛𝑑𝑖𝑐𝑢𝑙𝑎𝑟 𝑡𝑜 𝑚} is symmetric but neither reflexive nor

transitive.

Activity 2 - To demonstrate a function which is not one-one but is onto.

Activity 3 - To draw the graph of sin−1 𝑥, using the graph of sin 𝑥 and demonstrates

the concept of mirror reflection (about the line 𝑦 = 𝑥)

Note - Above activities should include the following parameters while performing

activities in the lab manual.

Objective.

Pre-requisite Knowledge.

Materials required.

Procedure.

Observations.

Conclusion.

Application.

Q6. MATH & REAL LIFE.

Create a collage that displays images of how math applies to real life. This could

include photos of people shopping, paying bills, buying a house, working or even of a

simple paycheck. Use your own life as inspiration for the collage by considering how

math affects your daily life. Include a sales receipt for a coffee you purchased, photos

of concert tickets or a picture of yourself in a work uniform, standing at a cash

register. Combine the collage with a written reflection of how math impacts you and

how you envision it playing a role in your entire life.

COMPUTER SCIENCE

Q1. Research about some websites which uses C++ as their programming language. Write

in your notebook about such 5 companies and their purpose using C++.

Q2. Mobiles are tiny computers in your hand, which have several components like

processor , display system, camera, memory, storage power management,

connectivity, sensors etc..

Go to your nearest mobile store and compare specifications of two phones, one you

have at your home and other-your dream phone. Compare the two in notebook.

Q3. Make a poster on A-4 size sheet to illustrate importance of AI(Artificial intelligence).

Try to take real life examples of its uses.

Q4. Following C++ programs need to be completed using turbo software for CBSE

PRACTICAL FILE. These should be submitted in a CD and also write all codes in

notebook too.

a) Write a C++ program to input two numbers m and n and display first m multiples

of n.

b) Write a C++ program to input day number of a week and display the

corresponding day name.

c) Write a C++ program to read a string and print it after replacing each of its capital alphabets by the corresponding small alphabet and each small alphabet by its corresponding capital alphabet.

d) Write a C++ program to input 10 elements in an array and then display these elements in reverse order.

e) Write a C++ program to input elements in a 2D array and then display the sum of main diagonal elements of this array.

f) Define a class student with the following specifications. Private members of the class:

Admission Number - An Integer Name - string of 20 characters Class - Integer Roll Number - Integer

Public members of the class: getdata() - To input the data showdata() - To display the data

Write a program to define an array of 10 objects of this class, input the data in this array and then display this list.

g) Define a class MP in C++ with following description. Private members :

MP name of type string Party name of type string No. of votes received as integer Nomination money as float

Public members :

A constructor to initialize MP name as NULL, Party name as “Independent” & nomination money as 5000.

A destructor to destruct MP class object. A function INMP( ) to input data for MP. A function OUTMP( ) to allow user to view the content of all the data

members. h) Write a menu-drive program to perform following operations on strings without

using built-in functions. • Find the length of strings • Compare two strings • Concatenate two strings

Q5. Project file work You can choose any topic for the project file, for example,

Hotel management School management Hospital management Bank management Student management Library management Game: Tic Tac Toe Ticket reservation system(Railways/ Airlines/Bus)

Visit to any of these locations (websites too), interact with the people present there and make a report for the same in notebook.

In report, define Classes (eg.- hotel, customer) Data members (eg.- hotel_name, no_of_rooms, types_of_rooms, cost_for_rooms,

Customer_name, no_of_days, total_amout, check_in_date, check_out_date)

Member function (eg.- input_customer_details(), display_customer_details(), calculate_amount() etc..)

Any other information which is required for project completion.

BIOLOGY

Q1. Prepare an investigatory project with the following contents, as assigned below.

a) Introduction b) Methodology c) Experiment and Observations

d) Comparison of data e) Result and Discussion f) Bibliography

S.NO. NAME TOPICS 1. Aakash Presence of pesticides in fruits and vegetables 2. Ayushi Reproductive Health 3. Bhavya Embryo transfer 4. Deepti DNA Isolation 5. Kavita Breast cancer 6. Kunal Test tube baby 7. Sree-Lakshmi Stem cells 8. Nishant Heamophilia 9. Pramod Cancer 10. Saleha IVF (In vitro fertilization) 11. Upasna ART ( Assisted reproductive techniques) 12. Vineet AIDS 13. Sunny Typhoid

Q2. Practice the following diagrams.

a) T.S. human testis b) T.S. of human ovary c) Male reproductive system

d) Female reproductive system e) T.S. of mature anther

f) Anatropus ovule

Q3. Revise all the chapters covered till date.

Q4. Soak any type of seed and observe its germination process and make a record of the

factors affecting the germination process.

Q5. Visit any botanical garden and prepare a report on scientific names of any fifteen

different plants.

PHYSICAL EDUCATION

Q1. Complete the Social Empowerment through Work Education and Action (SEWA) project on A4 size sheet in a spiral bind file. Read the given guidelines carefully while making the project.

Guidelines for Project 1 Name of the project: Swachcha Vidhyalaya Swachcha Bharat.

a) Focus: To spread awareness about Cleanliness and Sanitation.

b) Key objectives: For learner or students Identify and clean the dirty places. Know the importance of cleanliness in neighborhood, parks, market places, roads

and cities.

Be aware of unclean and unhealthy surroundings as breeding ground of epidemics and diseases.

c) Project process Identify the area of focus and prepare a road map to achieve the given targets. The given ideas can be further explored. Disposal of human waste properly and safely. Proper garbage disposal. School sanitation. Personal hygiene. Green and blue bins. Water conservation. Spending a day with sanitary workers and visiting a city water works. Collect the above data and road prepare report of the class.

d) Suggestions Students are required to complete the task in the groups allotted in advance by

the mentor. They need to perform the same activity individually also so that they can assess

their own learning from the project. Create awareness and take up projects to ensure cleanliness of water sources

like lakes, rivers, ponds. The allotted groups can share their conclusion and experience of the project

through TV programs and make videos on you tube.

Guidelines for Project 2 Name of the project: Dignity of Labour.

a) Focus: Considering the inequality in the society so that steps can be taken to uplift the dignity of labour class.

b) Key objectives: For learner or students Understand the importance of different occupations in our social system such as, ice-cream lorry, balloon man, tea staller, kite seller, bangle seller,knife sharpener, food lorry, etc.

Inculcating respect for all types of work among everyone. Understanding the value of Human Rights.

c) Project process Identify the area of focus and prepare a road map to achieve targets. The given hints can be further explored. Collect newspaper cuttings highlighting respect for human rights and violation of

human rights. Collect views of elders/parents/other adults on the same. Collect quotations and quips on the same. Spending a day with sanitary workers and visiting city water work. Collect the above data and road prepare report of the class.

d) Suggestions

Students are required to complete the task in the groups allotted in advance by the mentor.

They need to perform the same activity individually also so that they can assess their own learning from the project.

Group can contribute to community work by regulating and facilitating the job of people from different walks of life in their respective areas.

Organize a discussion in group where people victimized due to their profession share their experiences and share how human rights were violated in their situations.

Reflective Thought

Students can discuss about the importance of different vocations in a social structure. Students can bring a change in their behavior towards themselves. They can discuss the social or mental problems that arise from lack of respect for

labor in different categories. Elucidate the ideas you have gathered from your preparation on the value of ‘dignity

of labor’. Note- You may follow the above guidelines and make the given projects.

Project 3: Empathy. Project 4: Being safe and responsible. Project 5: Reduce, Recycle, Reuse most important 3R’s and now Respect. Project 6: First Aid: Awareness and Demonstration. Project 7: Plantation of shade/fuel/ornamental/avenue trees. Project 8: Preparation of family budget. Q2. Engage yourself in any adventurous activity. Share you experience in a spiral

project file. Also paste the pictures in the file. Q3. Complete the given practicals in physical education practical file.

Practical 1: Modified AAHPER administration for all items.

Practical 2: Draw a neat diagram of Basketball. Labeled diagram of field and

equipment Rules, Regulations Terminologies and Skills.

Practical 3: Draw a neat diagram of Athletics. Labeled diagram of Standard track field

and equipment Rules, Regulations Terminologies and Skills.

Practical 4: Conduct Barrow 3 items Test on 10 students.

Practical 5: Procedure for administering Senior Citizen Fitness Test for 5 Elderly

Family Members.

Practical 6: Procedure for Asana, Benefits and Contradiction for any two Asana each

Lifestyle Disease.

PSYCHOLOGY

Q1. In Psychology, case studies are often used for clinical and research purposes. It is

basically a single case design where in depth study of a case is conducted. The case

can be of an individual with distinguishing characteristics or a group of individuals

having some commonality. The cases we select for study are unique and therefore,

are rich in information. You need to conduct interviews, observations, survey

research method or form a questionnaire to gather information. The Case Profile

includes the following headings

a) Certificate

b) Acknowledgement

c) Contents

d) What is a case study

e) Demographic Data

f) Why did you choose your subject

g) How did you approach your subject

h) How did you make rapport with your subject

i) Family tree

j) Birth history

k) Information about socioeconomic status consisting of information about mother’s

/father’s education and occupation, number of members in the family-brothers,

sisters and their birth order

l) Information about physical health, physical characteristics.

m) Childhood history

n) Adolescent stage

o) Relationships with father, mother, sibling, friends, teacher ( under separate

headings

p) Methods used

Interview

Observation

Psychometric testing

q) Any other information

r) Analysis

s) Interpretation

t) Conclusion

u) References

Make a case study file in which you are required to choose a person on whom you

want to do your case study. The person should be willing to cooperate with you.

Q2. Internship enables the students with practical exposure in their core area of interest

which in turn will be the pathway to their personal and professional training. An

internship report needs to be submitted with details of all that was learnt during the

week at Fortis Hospital. The report would include

a) Certificate

b) Acknowledgement

c) Contents

d) Log sheet

e) Daily report

f) Case Report

g) Key Learnings