By Walker Gabauer

Chemical Name and Formula

Calcium carbonate CaCO3

3 Uses For Chalk

Physical Properties

3 Facts About Chalk

  1. Calcium Carbonate (CaCO3) also known as chalk is a type of limestone
  2. Chalk has been used for drawing since the prehistoric times
  3. Chalk began being used in classrooms in the 19th century when classrooms started having more students and the teachers needed a convenient way of displaying information to the whole class.