Chalk It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock. Most people first encounter the word "chalk" in school where it refers to blackboard chalk, which was originally made of mineral chalk, since it readily crumbles and leaves particles that stick loosely to rough surfaces, allowing it to make writing that can be readily erased. Blackboard chalk manufacture now may utilize mineral chalk, other mineral sources of calcium carbonate, or the mineral gypsum (calcium sulfate). While gypsum-based blackboard chalk is the lowest cost to
You-Are-Loved Chalk Message Project suicide prevention awareness campaign for LGBTQ college students. The project continued annually each October until 2012. In May 2012, the Chalk Message Project became part of Active Minds' National Day Without Stigma program. The Chalk Message Project raised awareness about suicide prevention for LGBTQ college students According to the Trevor Project, (a 24/7 crisis intervention and suicide prevention lifeline) LGBTQ youth are four to eight times more likely to attempt suicide than heterosexual youth. While little research has been done on suicide among LGBTQ college students specifically, a 2010 study from Campus Pride suggested a "chilly" climate for America's LGBTQ