1 063 TOOTH DECAY This is an exercise with reference to health and hygiene. To make children realise tooth decay starts with improper dental care. MATERIALS REQUIRED Two chalk pieces and sugar solution 2 Chalk piece Chalk piece wet with sugar syrup Dip a piece of chalk in sugar solution while the other piece keep as such. 3 Keep both the chalk pieces one dipped in sugar solution and the other not dipped on a piece of paper near an open window. Now keep watching periodically. 4 Notice ants soon gathering near the chalk piece with the sugar solution and taking bits of it away with them. 5 You can then notice cavities in the chalk which had the sugar solution. In the same way if you do not maintain oral health and do not brush your teeth after eating especially sweets cavities get formed. 6 Damaged tooth Good tooth
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