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15 Materials we Use, , -, , SAY IT RIGHT, Oral Exerclse), Q.1. Fill appropriate, ehite cen1ent,, , terms in, , soap, detergent,, , the blanks:, , Portlana, fatly, wearing of bones, tooth decau. hard, soft,, , (1), , The s u b s t a n c e t h a t h e l p s w a t e r to r e m o v e d i r t from, , (2), , Fluoride is, , used in toothpaste to prevent, , (3) Soap is a salt of, , oy, , acid, , be used in, , (4), , Synthetic detergents can, , (5), , For construction purposes, , d, , the s u r f a c e o f m a t e r i a l is a, , O0th, , doteayent, , deCay, , and sodium hydroxide, water as well., , hoad, , Pootlonc, , cement, , used, is the most commonly, , cement., , Answers, , Q.2. Name the following:, , (alcium, , (1) Principal ingredients oftoothpaste, , (asbonae anohegenphospht, , Calcium, , (2) Essential for strengthening of bones., (3), , cid), , te, , Ond SoOp po, rshikaFa;, , nut a1iha ), , Soap, , Natural detergents in common use., , ASSESSMENT, (Summattve Section), , Q.3. Answer in one sentence:, , (1), , What is meant by natural and man-made materials?, , Ans. Vatual maleaiols aae.hase. hat Qe-bunel n atuToly, Osound s , while mon mode. malea/ol hove been made by., (2), , humans, , What is a detergent?, , Ans., , .., , ********************, , *****, , ********, , *******************************************, , ***********************************************************s***********************************, , Q.4. Answer in short:, , (1) How does the use of a detergent help to clean soiled clothes?, Ans., , Delagerts, , ase, , uSed to.cleon, , he dia and, , oily 9taiar an, , the clothes he molecules. atdeleoyen 0oe.long. in theiy.Stute., his molrule holds ant o 0al moe, 0newhupokrjhe, S S1dand, O, hhepilon, mxe, Jeile, (2)erlg, OnthotheDueto, check with the, of, How will you, , Ans., , help, , soap, , powder whether, , *********************'*****, , water is, , hardeofhP huS, *********** *****'***************, , (110), , ., , beon, , *****
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als we Use, , 113, , Bath soap and soap for, , washing clothes., , UBoth Soop is used-or peasonol Soop fbr washing lohes r P, , cleon liners, , he clothes cleon, , i s o hood Soo, , his Soop is mild, his, , ), , 4), , is8f0tassiurn, , SH, , ofGty()Thio is,g, Sodium, , atly acid, , g cids, , Modern cement and ancient cement., , SoH, , ns., *, , MAKE AND LEARN, , Learning Project), Make, , a, , list of natural and, , Nowadays,, What, , why, , causes, , are, , man-madesubstances you, , roads made of, , see, , around you., , concrete?, , hardness of water?, , of, Collect pictures, the, Note down all, , substances, , that, , information, , were, , given, , used for, , on a, , tooth, , cleaning, , teeth in ancient times., , powder/ toothpaste, , container, , or carton, , and discuss
