Changes

'''Pencils''' are writing utensils generally made of [[wood]] or [[plastic]] with a [[graphite]] center used to make marks on a surface. They differ from [[pens]] because their marks can be erased. Number two pencils are preferred for standardized tests.

'''Pencils''' are writing utensils generally made of [[wood]] or [[plastic]] with a [[graphite]] center used to make marks on a surface. They differ from [[pens]] because their marks can be erased. Number two pencils are preferred for standardized tests, though a great many other densities of graphite are used for other purposes.