NAVY CHILDREN SCHOOL, GOA HOLIDAY ACTIVITY ACADEMIC YEAR 2015-2016 CLASS X DATE OF SUBMISSION FOR ALL SUBJECTS : 23 JUNE 2015 MATH 1. Show that √5+√3 is an irrational number, given √15 is an irrational number. 2. If HCF (65,117) is expressed in the form of 65m+117n.Fimd the value of m and n. 3. In a seminar the number of participants in Hindi, English and Maths are 60, 84,108 respectively. Find the minimum number of rooms required if in each room the same number of participants are to be seated and all of them are being in the same subject. 4. Find the greatest number that will divide 445,572 and 699 leaving the remainders 4, 5 and 6 respectively. 5. On a morning walk 3 persons step off together and their steps measure 40cm, 42cm and 45 cm.What is the minimum distance each should walk so that each can cover the same distance in complete steps? 6. Find the value of ‘k’ such that the quadratic polynomial 3x2+2kx+x-k-5 has the sum of zeroes as half of their products. 7. If one zero of the polynomial (a2-9)x2+13x+6a is a reciprocal of the other ,find the value of ‘a’. 8. Find all the zeroes of the polynomial x4+x3-34x2-4x+120 if two of its zeroes are 2 and -2. 9.If the polynomial 6x4+8x3+17x2+21x+7 is divided by another polynomial 3x2+4x+1 then the remainder comes out to be ax+b. Find a and b. 10. On dividing x3-3x2+x+2 by a polynomial g(x), the quotient and remainder were x-2 and -2x+4 respectively. Find g(x) _______________________________________________________ SOCIAL STUDIES (ECONOMICS) CHAPTER : DEVELOPMENT. TOPIC : DEVELOPMENTAL GOALS ACTIVITY DESCRIPTION OF THE ACTIVITY : WRITE UP ON THE DIFFERENT DEVELOPMENTAL GOALS : INTERVIEW 5 DIFFERENT PEOPLE FROM DIFFERENT BACKGROUND BASED ON THEIR INCOME AND MAKE A WRITE UP IN 2 TABULAR COLUMNS ONE FOR THE PERSON INTERVIEWED AND ONE FOR HIS GOALS. TOOL TO BE USED : SCRAP BOOK ASSESSMENT : GRADED FOR FA1. 1 SCIENCE PHYSICS 1Give reasons: Q1 Why is tungsten used almost exclusively for filament of incandescent lamps? Q2 Why is the conductors of electric heating devices, such as toasters and electric irons made of an alloy Q3 Why is series arrangement not used for making domestic circuits? Q4 Why is ammeter always connected in series? Q 5 Why is voltmeter connected in parallel? (Write the following give reason questions as Activity 2 in your physics lab journal second half 2. Write practical for resistance in series as Experiment no. 2 and resistance in parallel as Experiment no .3 in physics lab journal in the first half maintained for practical. BIOLOGY Q 1.Collect information on (a) Economic importance of plants. (b) Role of photosynthesis (also add pictorial illustration)-to be done in bio journal second half. Q2.To write experiment in the journal Leaf peel showing stomata.(First half) CHEMISTRY Q1.Write an activity to prove that air and moisture is necessary for Rusting with detailed diagram. ENGLISH 1. Long Reading Text - The Diary of a Young Girl - Read chapters 1 to 7 (Term 1) 2. Grammar Workbook -- Tenses -- Integrated Exercises Pages 35 – 40 in worksheet notebooks (last pages) _____________________________________________________ Hindi and Sanskrit Activity is listed separately 2

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# 1. Show that √5+√3 is an irrational number, given √15 is an