1 / 6

The Pencil

The Pencil. What’s that simple little thing we use everyday REALLY made of?. Function of the Pencil. What is the function of a pencil? Why do we have them?

alisa-cash
Télécharger la présentation

The Pencil

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Pencil What’s that simple little thing we use everyday REALLY made of?

  2. Function of the Pencil What is the function of a pencil? Why do we have them? The function of a pencil is so that people can write, draw, or show ideas without getting their hands messy and to be able to erase mistakes instead of crossing them out.

  3. Major Materials of a Pencil • There are 5 Major Materials to the pencil, and they are…. • Wood • Glue (inside pencil) • Metal • Rubber • Graphite Compound

  4. Why THESE Materials? Wood Glue Metal Rubber Graphite • Wood is used to keep graphite from hands or skin so you don’t get all messy • It’s cheap • Lightweight • Easy to get • And it’s soft enough to sharpen • Glue is used to keep all the parts together • Easy to get/use • Glue is sticky, so it works great • Metal is used to keep eraser (or rubber) on the pencil, but so that it is still possible to take the eraser off. • Rubber is there so people are able to erase any mistakes that are made instead of crossing it out • It is easy to write with, and can be erased with rubber (an eraser) • Graphite is also strong and not poisonous

  5. History of the Pencil The pencil was invented in England, where graphite was discovered in the Cumbrian Mountains, in 1565, but it was believed that it was lead (hence the name lead pencil). Chemist Karl Wilhelm Scheele proved that the lead pencil contained graphite (carbon) and not lead. The pencil, from there, just kept evolving into what we have and use today. The only major difference is the look and the graphite mixture. N. J. Conte invented the pencil and started manufacturing them in 1795.

  6. Bibliography wiki.answers.com/Q/Function_of_the_pencil Answers.com Unknown 10/21/10 answers.yahoo.com/question/index?qid=20080227180444AAvY33R Yahoo! Answers Unknown 10/22/10 wiki.answers.com/Q/Why_can_graphite_used_in_a_pencil Answers.com Unknown 10/23/10 www.faber-castell.de/12546/Products/Pencils/History-Of-The-Pencil/index.aspx History of the Pencil Faber Castell 10/23/10

More Related