S.L.S D.A.V Public School,Mausam Vihar, Delhi-51ISO : 9001: 2008

Holiday Homework, 2012-2013Class VIII

ENGLISH 1. Eating a balanced diet during childhood and adolescence is very important. Write an article in your

notebook on the topic, “ Eating junk food leads to obesity.”2 A Read any one of the suggested books thoroughly.

a) The adventures of Tom Sawyer by Mark Twainb) Harry potter –the series by J K Rowlingc) Around the world in 80 days- by Jules Verna

B Prepare the book review covering the suggested sub-headings a) About the authorb) Theme of the bookc) Characters liked or dislikedd) Critical review

SCIENCE

A. Prepare a crossword puzzle on A4 size pastel sheet with 20 words involving scientific terms associated with the following chapters : Pollution of Air, The Cell-Its Structure and Functions, Metals and Non Metals.B. Do the assignment in your notebookQ1 (i) Draw a neat diagram of a plant cell. Label the following parts:

a) Power house of the cellb) Vacuolec) Cell walld) Plastid

ii) Why are plant cells more rigid than the animal cells? iii) Name any two cell components present in a plant cell but absent in an animal cell.Q2 i) Write the functions of the following cell organelles

a) Cell wallb) Ribosomec) Endoplasmic reticulum

Q3 What is chromatin? What changes occur in chromatin during cell division?Q4 i) Write any two functions of cilia? ii) In which unicellular organism do you observe these small extensions? iii) Why are mitochondria called the power house of the cell?Q4 Animal cell show large variations in shape whereas plant cells do not . Why?Q5 Define tissue.Q6 State the major cause of Global Warming.Q7 Name any two acids that make the rain water acidic. How is marble cancer caused?Q8 How does carbon dioxide affect transport of oxygen to various parts of body?Q9 i) Define Green house effect with its consequences. ii) Name two Green house gases.Q10 In winters, a thick fog like layer envelops the atmospherei) Write the name of this layer.ii) How is it formed?iii) Give its one harmful effect.Q11 Name the green cell organelle present in a plant cell. Give its main function.Q12 Name the gas which is formed due to incomplete combustion of fuels. Why is it considered to be

poisonous in nature?

MATHEMATICS

Solve the following questions in your notebook:1. Find the square root of 10 correct to 4 decimal places.2. Simplify: √81 +√8100+√0.00813. A General wishing to draw up his 64,019 men in the form of a square found that he had 10 men extra.

Find the number of men in the front row.

4. Evaluate : 3√ 0.0270.008

÷ √ 0.090.04

- 1.

5. Find the smallest number which when multiplied with 3600 will make the product a perfect cube. Further, find the cube root of the product.

6. Estimate the cube root of 12167 and 32768.7. Simplify the following using a suitable identity :

i. ( 34p ²+ 2

3q ²)( 3

4p ²+ 2

3q ²)

ii. (x+ 34y−4 z)( x+ 3

4y−4 z )

iii. 103 x 97iv. (85)2 –(95)2

v. (6a + 5b +4c)2 – (6a - 5b -4c )2

8. Find the value of 4x2 +12xy +9y2 if x=2 and y=-2.9. Factorize the following:a. x2 +5x -104b. 49x2 – 64c. 16z2 – 40yz + 25y2

d. 9x2 +4y2+36 -12xy +24y – 36xe. x2 +5x -104f. 144a2 + 360ab + 225b2

10. If d +1d

= 4, find (d2+ 1d ² )

Prepare these three chapters for credit 1 exam to be held on 16/July/2012. Squares and square roots Cubes and cube roots Algebraic identities

SOCIAL SCIENCE Prepare the project report on any one of the following topics :-

(The project should be submitted on 6th July.)

A. Role of the Constitution-Preamble-Need & importance of Constitution-Features of Constitution-Fundamental rights & Duties-Directive Principles of State Policy

B. Conservation of Natural Resources -Bio reserves

-Wild life sanctuaries -Conservation of endangered species

Guidelines for the Project* Collect information from various sources like Newspapers, photographs, articles from magazines, brouchers, Internet etc.* Criteria for evaluating project work include content ,accuracy, originality, presentation and creativity.* The project should be hand-written. Print-outs will not be accepted.* All the photographs should be labeled and acknowledged.

On the outline map of India mark and show major rivers of India.Sketch out the journey and life of any one river of India on A4 size sheet under the following headings :- Source, course and its tributaries -Geographic features formed by the river in upper, middle and lower course-Legends and songs associated with the river

Do the following questions in the respective notebooks.1. What factors are responsible for formation of soil?2. What is soil erosion?3. Discuss the causes of soil erosion.4. Describe various steps to conserve soil.5. What are the various methods for the conservation of water?6. Write two-two features of six Fundamental Rights.7. Explain Fundamental Duties.8. Write the features of Indian Constitution9. Explain the division of Legislative powers between Union Government and State Government. 10. Describe the composition of Union Government of India.

HINDI

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SANSKRIT

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FRENCH

1. Révisez les exercices grammaticaux couvert dans la classe .2. Ecrivez un poeme francais environ <Les Saisons de l’Année>.(Write a poem about seasons – how do they relate to our life, what message each season passes on to us).3. Faites des cartes carrée(flash cards ) - 2 par chaque étudiant(e)

(R.No. 1-10)-des adjectifs avec leurs formes mas./ fem/ sing. /pluriel(R. No. 11-20)-des verbes pronominaux avec des images( R.No. 21-30)- L’heure(R.No. 31-44)- Nombres cardinaux et ordinaux

4. Ecrivez un pargraphe en 100 mots .Commencez avec < J’aime les vacances d’été parceque…………>(I like summer vacations because..)

5. Decrivez deux personnes populaires( une femme et un homme) de votre choix en 100 mots et collez leurs images.Rangez –le dans un dossier.