Thursday, March 21, 2013

Did you know-Misconceptions about pencil

Misconception: Pencils are made with lead

Pencils contain no lead, so there is no risk of lead poisoning if you stab yourself with one. Instead they are made up of a mixture of graphite and clay. Graphite, a crystallized form of carbon, was discovered near Keswick in the mid-16th century and was named from the Greek “graphein”, meaning “to write”.

0 comments:

  © Blogger templates Newspaper III by Ourblogtemplates.com 2008

Back to TOP