Bad things may happen like scarring and tumors.
Chalk is a form of calcium carbonate, so chalk dust is also a form of calcium carbonate.
Silicosis. Over time the exposure to silica dust in blocks can have irreparable effects on the lungs.
White boards are more environmentally friendly because chalk leads to airborn dust being breathed into the lungs. It also eliminates the need for the manufacturing and shipping of chalk.
Maybe :3
The chalk will be ground into chalk dust by the pebbles.
dust from a chalk. Chalk is made from calcium carbonate, CaCO3.
mechanical chalk dust dispenser's hypothesis is that it aims to hasten the removal of chalk dust on the chalkboard eraser
balls
milk provider,chalk dust,saw dust
Chalk dust (calcium carbonate) is not magnetisable.
The scientific name of chalk dust is composed mainly of calcium carbonate, which is a mineral compound.
you can filter it