CLASS X

HOLIDAY HOMEWORK CLASS X

Dear students

Have a fun-filled summer vacation. Please make a serious attempt to

complete the assigned task. It is essential to attempt the task on your

own. Minimum help should be taken from Parents.

Remember, “All you can do is the best you can do, and the best has its

own reward”. Please take care of the following:

• Read newspaper daily.

• Watch informative programmes on Discovery channel, History channel

and National Geographic channel.

• Pursue and keep yourself happily engaged in the activity of your choice.

A NOTE FOR PARENTS

Make this summer special!

1. Have at least two meals together with your children.

2. Try to share some stories/experiences with them and tell them about your childhood.

3. As far as possible keep them away from TV and other electronic gadgets.

ENGLISH

Make a Comic Strip of the poem „The Frog and the Nightingale‟ by Vikram

Seth, with at least 20 dialogues.

Attempt the following Writing Tasks:-

You are Himanshi Jaggi living at 1652, Outram lines, Delhi 54. The

residents of your area are facing a lot of inconvenience due to poor

maintenance of the public park in your locality. Write a letter to the editor of

a local daily drawing attention of the concerned higher authorities towards

the problem and requesting them to solve it. (Word Limit: about 120 words)

Write a letter of complaint in about 120 words to the Manager of the hotel

where you have just spent your holiday with your family. Complain about:

The showers in the washroom

The room not upto the mark

The poor quality food

Read the Novel „The Story of my Life‟ and answer the following questions in

your register-

1. Describe the sail boat experience of Helen.

2. What were the qualities that attracted everyone towards Helen before she

fell victim to her mysterious illness? Give your views.

3. Helen‟s father stood silent at Tuscumbia station. Describe his feelings at that

moment. What does this reveal about his character?

4. Explain how Miss Sullivan made Helen understand the concept of „Love‟.

5. Also mention the questions and doubts raised by Helen while understanding

the concept.

6. Describe in detail Helen‟s first trip on the ocean while going to Plymouth and

how did she feel about it.

7. Mildred was an alert and observant child. Comment with reference to the

train incident at Fern Quarry.

8. The episode of horseshoe crab taught Helen a great lesson. Explain in 150-

200 words.

9. Create a pen portrait of Martha Washington as a friend of Helen in her

childhood in about 150-200 words.

HINDI

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SANSKRIT

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MATHS : Practice the given worksheets.

SCIENCE

A. Solve the assignments of chapters covered so far (Attached below). Do it in your

class register.

B. Revise Periodic Test syllabus thoroughly.

ASSIGNMENT (PHYSICS)

CHAPTER-12 (ELECTRICITY)

1. How many 40 W bulbs can be safely connected in a parallel circuit which is

drawing current through a 5A fuse from a 220 V supply?

2. Calculate the resistance of a conductor when the current flowing through it is 0.2

A and the potential difference is 0.8 V?

3. A wire of length l and area of cross-section A was drawn into a wire of double its

length by melting it. If its original resistivity and resistance were rho and R

respectively, what will be its new resistivity and resistance?

4. Two electric bulbs A and B are marked 220 V, 40 W and 220 V, 60 W

respectively. Which one of the two has the filament of larger resistance? Give

reason for your answer.

5. A 9Ω resistance is cut into three equal parts and connected in parallel. Find the

equivalent resistance of the combination

6. A wire of resistivity “rho‟ is pulled to double its length. What will be its new

resistivity?

7. A torch bulb has a resistance of 1 Ω when cold. It draws a current of 0.2 A from

a source of 2 V and glows. Calculate

(i) the resistance of the bulb when glowing and

(ii) explain the reason for the difference in resistance.

(ii) What is the direction of flow of conventional current?

8. Why is it not advisable to handle electrical appliances with wet hands?

9. . Two electric bulbs marked 100W 220V and 200W 200V have tungsten filament

of same length. Which of the two bulbs will have thicker filament?

10. A geyser is rated 1500W, 250V. This geyser is connected to 250V mains.

Calculate –

i) The current drawn

ii) The energy consumed in 50hrs.

iii) The cost of energy consumed at Rs. 2.20 per kWh.

What is the function of an electric fuse? Name the material used for making fuse.

In household circuit where is fuse connected?

CHEMISTRY

1. If few drops of a concentrated acid accidentally spill over the hand of a student, what

should be done?

2. Which acid is produced in our stomach? What happens if there is an excess of acid in

the stomach? How can its effect be cured?

3. What are strong and weak acids? In the following list of acids, separate strong acids

from weak acids:

Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid

4. Name the natural source each of the following acids

a) Citric acid

b) Oxalic acid

c) Lactic acid

d) Tartaric acid

5.15ml of water and 10ml of sulphuric acid are to be mixed in a beaker.

a) State the method that should be followed with reason.

b) What is this process called?

6. Stain of curry on a white cloth becomes reddish brown when soap is scrubbed on it

and turns yellow again when the cloth in washed with plenty of water. Give reason for

the following

7. Curd should not be kept in copper or brass vessels. What is done to protect it?

State reason for the following statements:

a) Ammonia is a base but does not contain hydroxyl group.

b) Tap water conducts electricity whereas distilled water does not.

c) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric

acid does.

8. A student dropped few pieces of marble in dilute hydrochloric acid, contained in a

test tube. The evolved gas was then passed through lime water. What change would be

observed in lime water? What will happen if exchange of gas is passed through lime

water? With the help of balanced chemical equations for all the changes explain the

observations.

9. A metal nitrate „A‟ on heating gives yellowish brown coloured metal oxide along with

brown gas „B‟ and a colourless gas „C‟. Aqueous solution of „A‟ on reaction with

potassium iodide forms a yellow precipitate of compound D. Identify A,B, C, D. Also

identify the types of both the reaction. Metal present in alloy which is used for soldering

purposes.

10. A reddish brown coloured metal, used in electrical wires, when powdered and

heated strongly in an open china dish, its colour turns black. When hydrogen gas is

passed over this black substance, it regains its original colour. Based on the above

information answer the following questions

a) Name the metal and the black coloured substance formed.

b) Write the balanced chemical equation for both the reactions.

11. Identify the type of chemical reaction taking place

a) On mixing a solution of potassium chloride with silver nitrate, an insoluble white

substance is formed.

b) On heating green colored ferrous sulphate crystals, reddish brown solid is left and

smell of a gas having odour of burning sulphur is observed.

12. Zinc liberates hydrogen gas when reacted with hydrochloric acid whereas copper

does not. Explain why?

13. A copper coin was kept dipped in silver nitrate solution for a few hours/days. What

will happen to the copper coin? What will happen to the colour of the solution?

14. When CaO is added to water taken in a beaker, rise in temperature is observed.

However, when Ba (OH) 2 is mixed with NH4Cl, a fall in temperature is observed. Why?

15. What do you mean by precipitation reaction? Explain by giving examples.

16. Why do gold and platinum not corrode in moist air?

17. A white salt on heating decomposes to give brown fumes and a residue is left behind.

a) Name the salt.

b) Write the equation for the decomposition reaction.

18. Write a balanced chemical equation for the reactions that take place during

respiration. Identify the type of combination reaction that takes place during this

process and justify the name. Give one more example of this type of reaction.

19. a) Explain two ways by which food industries present rancidity.

b) Discuss the importance of decomposition reaction in metal industry with three points.

20. Name the chemical which is injected into the skin of a person:

1) During an ant‟s string

2) During the nettle leaf sting.

BIOLOGY

1. If you chew a piece of bread for a long time it tastes sweet. Why?

2. In an aquarium, why do the fish open and close their mouths at regular intervals.

3. Give reasons why –

a) Herbivores have longer small intestine as compared to carnivores.

b) Mucus is secreted along with HCl in the stomach.

c) Rings of cartilage are present in trachea.

d) Lungs always contain a residual volume of air.

e) Aquatic animals have a higher breathing rate.

4.In each of the following situations what happens to the rate of photosynthesis?

(a) Cloudy days

(b) No rainfall in the area

(c) Good manuring in the area

(d) Stomata get blocked due to dust

5. Name the following

(a) The process in plants that links light energy with chemical energy

(b) Organisms that can prepare their own food

(c) The cell organelle where photosynthesis occurs

(d) Cells that surround a stomatal pore

(e) Organisms that cannot prepare their own food

(f) An enzyme secreted from gastric glands in stomach that acts on proteins.

6.a) Draw a well labelled diagram to show open stomatal pore. State two functions of

stomata.

b) How do stomata open & close.

7.Leaves of a healthy potted plant were coated with Vaseline. Will this plant remain

healthy for long? Give reasons for your answer.

8.“All plants give out oxygen during day and carbon dioxide during night”. Do you

agree with this statement? Give reason.

9. Two green plants are kept separately in oxygen free containers, one in the dark and

the other in continuous light. Which one will live longer? Give reasons.

10. If a plant is releasing carbon dioxide and taking in oxygen during the day, does it

mean that there is no photosynthesis occurring? Justify your answer.

11. Differentiate between an autotroph and a heterotroph.

12. Is „nutrition‟ a necessity for an organism? Discuss.

13. What would happen if green plants disappear from earth?

14.What are the adaptations of leaf for photosynthesis?

15.How do carbohydrates, proteins and fats get digested in human beings?

16. Present the following in the form of flow charts /diagrams on A4 sized sheets. (Any

four)

Use your creative imagination to make them more attractive and innovative.

1. Nutrition in Plants

2.Nutrition in Amoeba

3.Digestive system in Human being

4.Respiration in human being

5. Structure of human nephron

6. Sectional view of human heart.

SOCIAL SCIENCE

Pocket Guide on First Aid-

Prepare a pocket guide on First Aid for your school. The project should begin with What are

search and rescue skills and objectives of search and rescue teams. Who should be the

members of the team? The precautions to be taken while rescuing a person. What is First

Aid? What should be first aid for Fainting, Burns, Bleeding, Frost bite, Electrocution,

Fractures and sprains, poisoning, heat stroke, dog bite and snake bite. The content shared in

the guide should be supported with adequate pictures so as to give a clear and elaborate

understanding about the topic. Choose awareness campaign strategy for either senior

citizens or illiterate people and prepare a brief write up.

Note: - Do the above given project work on A4 Size ruled sheets. It will be hand written and

supported with adequate pictures and illustrations appropriately labelled. The total length

of the Project report will be 15-20 pages and presented in a neatly bound simple folder.

The project report will be developed and presented in the following order:

Page- 1 Cover Page showing project title, student information, school and year.

Page-2 Contents : List of contents with page numbers.

Page- 3 Acknowledgements : Acknowledging the institution, offices and libraries visited

and persons who have helped.

Page- 4 Project Overview : Purpose, Aim, Methodology and experiences while doing

the project.

Page- 5 to Page- 12 Subject Matter: Chapters with relevant headings.

Page- 13 Conclusions: Based on findings. (Summary and Suggestions).

Page- 14 Bibliography : It should have the title, pages referred, author, publisher, year

of publication and if a website the name of the website with the specific website link

which has been used.

All the photographs & sketches should be labelled and acknowledged.

PROJECT REPORT FOR CLASS X

SPECIMEN

ACKNOWLEDGEMENTS

This is to acknowledge all those without whom this project would not have been reality. Firstly, I would wish to thank our Social Science teacher …………………………………….. who gave his/her immense support, dedicated his/her time towards it and made us understand how to make this project. Without his/her guidance, the project would not have been complete.

The matter contained in it has been widely taken from the internet. The source of the newspaper article is ‘The Times of India’. The statistical data has been extracted from ………………………………….

PROJECT EVALUATION PROFORMA

SCHOOL’S NAME _______________________________

ADDRESS _______________________________________

STUDENT’S NAME _______________________________

ROLL NO. ______________________________________

CLASS __________________________________________

SECTION ________________________________________

TEACHER’S ASSESSMENT:

1. Content accuracy and originality ______________

2. Presentation and creativity ___________________

3. Process of project completion _________________

4. Viva-Voce __________________________________

5. Overall remarks _____________________________

_____________________________________________

6. Teacher‟s signature _______ Date _______with school stamp.

Prepare the chapters & reckoner done till May for the upcoming periodic

test.