What is Composite material?
[[Image:Kohlenstofffasermatte.jpg|thumb|right|A cloth of woven carbon fiber filaments, a common element in composite materials]] '''Composite''' materials are made from two or more basic material. They are not just placed together. They are merged together. This create a material with ''useful properties unlike the individual elements''. The composite material as a whole may behave differently from either of its parts. For example, [[reinforced concrete]] (made of [[concrete]] and [[steel]]) has resistance to [[pressure]] and to [[bending force]]s. [[Bullet-proof glass]] (made of [[glass]] and [[plastic]]) is far more resistant to impact than either glass or plastic on their own. Concrete itself is a composite material. It is one of the oldest man-made composites, used more than any other man-made material in the world.<ref>Lomberg, Bjorn 2001. ''The skeptical environmentalist: measuring the real state of the world''. Cambridge University Press, p138. {{ISBN|978-0-521-80447-9}}</ref> [[Wood]] is a natural composite of [[cellulose]] [[fibre]]s in a [[matrix]] of [[lignin]].<ref>Hubbe M.A. & Lucia L.A. 207. The love-hate relationship present in lignocellulose materials. ''Bioresources''. '''2''', 534.[http://www.ncsu.edu/bioresources/BioRes_02/BioRes_02_4_534_535_Hubbe_L_BioResJ_Editorial_LoveHate.pdf]</ref><ref>Hon, David and Shiraishi, Nobuo (eds) 2001. ''Wood and cellulose chemistry''. 2nd ed, New York: Marcel Dekker.</ref> The earliest [[Artificial|man-made]] composite materials were [[straw]] and [[mud]] combined to form [[brick]]s for [[building]] [[construction]]. This ancient [[Brick#Mud bricks|brick-making process]] was documented by [[Ancient Egypt|Egyptian tomb paintings]]. It is still used today in some places. [[Fibre-reinforced polymer]]s are in wide use today, as is [[glass-reinforced plastic]]. [[Image:Plywood.jpg|thumb|right|[[Plywood]] is a common composite material that many people encounter in their everyday lives]] The [[Bible|Biblical]] book of [[Exodus]] tells of the [[Israelites]] th