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the concept of zero. His circle had a stick at the end different form the others but most importantly his zero can be used all alone which makes it an independent number not just a concept functioning as a placeholder. Even though the positions of that sign were strictly restricted, this can be considered as the first modern zero concept of the old world. The concept of zero is brought to the Europa via Arab Peninsula, Spain –Muslims lived there have carried it through- and the nation of Moors. An Italian mathematician named Leonardo of Pisa, also known as Fibonacci, brought the Arabic numbers to the Europe in year 1202. Eventhough at first he talked of it as an operation just like multiplication division etc., through the end of the thirteenth century the idea and the usage of zero become common in Europa. Until the early sixteenth century they used to use the Arabic numerals on the Europe more dominantly. So, as we talk of the number zero, it’s logical to say that it is not the invention of a man or even a group. During all the period on the timeline from the first urbanizations to the Medieval Ages zero had a development. The knowledge that is known about it have been progressed and we learned more about it. Nobody could 100% assure that it will stay as it is right now till the end of the world. Invention of it has made us move to the better. It made some concepts easier than they used to be. Also a big mystery has been unrevealed as far as we know. How can anything represent nothing? Resources: Gökçen Nilay NAKTİYOK 9-B http://yaleglobal.yale.edu/about/zero.jsp http://www.icstm.ro/DOCS/josa/josa_2008_1/a.22_A_ HISTORY_OF_ZERO.pdf http://www.icstm.ro/DOCS/josa/josa_2008_1/a.22_A_ HISTORY_OF_ZERO.pdf http://open.conted.ox.ac.uk/sites/open.conted.ox.ac.uk/ files/resources/Create%20Document/Arabic_IndianandZero. ppt MATHEMATICS DEPARTMENT TEACHERS MAGIC OF A SNOWFLAKE Amazingly, snowflakes always have 6 sides and similar to the human print, it is thought that no toe snowflakes are ever exactly the same. Both the form and shape of a snowflake depends on the temperature and mixture content of the cloud. Snowflakes can be categorized into 6 main types; plate, column, stars, needle, and capped column. If we had the opportunity to inspect all the snowflakes, we could see that all of the snowflakes are different from each other. The reason for that is the molecular structure of the water molecules, therefore the snow crystals are formed in different geometrical shapes. The most interesting fact about snowflakes is that all of them are perfectly and flawlessly symmetrical. When the amazing structure of snowflakes was discovered, the scientists from all over the world were impressed. It is such a great miracle that all of the snowflakes have hexagon shape and different from each other. The world’s largest snowflake ever snowflake was found 38 centimeters wide and 20 centimeters thick. This snowflake occurred at Ford Keogh, Montana, USA on 28 January 1887. Reference: http://www.matematikciler.org/matematikselguzellikler/ilginc-bilgiler/816-basimiza-gelen-mucize-karkristalleri.html http://weather-facts.com/snowflakes-facts.php Head of Department Serap HAKTANIR Teachers Begüm BİÇER Gökhan KARAKOÇ Reyhan SAĞLAM KARAKOÇ Burcu YAĞIZ Nur GÖKTUĞ 9-B THE CLAPPER 2014 - 2015 42