Talk:Chalk
From Academic Kids
Anome, while you're at it, would you please link chalk to the hardness scale? As in, diamond (#10) can scratch substance #9, and so on... Ed Poor
Could some of the places where chalk rock is found be moved to Downland? --Steinsky 13:55, 13 Aug 2003 (UT
Curious that statement about chalk for drawing not really being chalk but gypsum. If you pick up a lump of natural chalk it writes on blackboards and slates and other surfaces perfectly well and looks and feels exactly like chalk in sticks.... so is that statement actually true? Graham 06:19, 29 Jan 2004 (UTC)
- I've picked up quite a few lumps of natural chalk, and they were all a lot harder than blackboard chalk! --Steinsky 19:24, 29 Jan 2004 (UTC)
Doesn't chalk come from calcite producing sea plankton - should this be mentioned?
