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u remove your pants and expose your dick and colour it chalk. it acts like chalk
Chalk is a form of calcium carbonate - CaCO3.
Chalk (use for writing on a greenboard in school) in Tagalog is called Tisa but commonly it is still called chalk.
Chalk
If you mean blackboard chalk, it is generally made of the mineral gypsum, which is calcium sulfate.
No well i am just telling you the answer i think because i went to a school that had chalk boards.
very different it was strict and you wrote on slate with chalk[mini blackboard with chalk]
No, it is a physical, not chemical change.
It can be used for the chalk bords .
Chalk sticks are a school supply, but not a stationery item; stationery is generally considered to be paper and envelopes for writing letters.
Students were using chalk at school in the early 1800s. Teachers had large chalkboards and students had slate boards to do their lessons on.
pure magnesium carbonate