Chalk
By Walker Gabauer
3 Uses For Chalk
Physical Properties
Elasticity
The ability to stretch
Porosity
The amount of holes or 'Pores' in an object
Permability
The ability for water to pass through an object
3 Facts About Chalk
- Calcium Carbonate (CaCO3) also known as chalk is a type of limestone
- Chalk has been used for drawing since the prehistoric times
- 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.