- Chalk is a soft, carbonate, sedimentary rock.
- It is usually white in colour.
- It has very high porosity.
- It is used for many purposes.
- It is in liquid or dry form.
- It is used as tailor’s chalk.
- Chalk powder is used for drawing boundary lines.
- It is used to draw sidewalks and driveways.
- It is also used as blackboard chalk.
- A piece of a chalk is the best teaching tool.
