Because, the eggshells cannot reflect the materials used in making the chalkboards,in sidewalks, it's okay,because it is rough,but in the chalkboards is is very slippery,that's,,hope it helps! :))
Mixing eggshells with chalk creates a rougher texture that makes it difficult for the chalk to glide smoothly on the chalkboard surface. This roughness hinders the chalk from leaving clear, well-defined marks on the surface.
Glass is too smooth. Friction is needed for the chalk to rub off and leave a mark.
The irritating noise when writing on a chalkboard happens at certain angles due to a phenomenon known as "stick-slip motion." When the chalk is held at these angles, it alternates between sticking and slipping on the board surface, creating vibrations that produce the noise. At other angles, the chalk moves more smoothly without the stick-slip behavior, resulting in no noise.
Rough blackboards are typically coated with a layer of chalk or chalk-like substances. When you write on them with chalk or a chalk marker, the texture of the board allows the writing implement to leave behind a visible mark. The rough surface of the blackboard provides enough friction for the chalk to adhere and create legible writing.
A blackboard appears black because it reflects very little light, absorbing most of the light that hits it. The dark color of the board helps to contrast with the white chalk used to write on it, making the writing clearly visible.
You can write 3m3
when we write with a pencil the lid will going to complete because of that the pencil will wear out.......
Chalk
Chalk.
A chalkboard is tough and scrapes the chalk which leaves chalk behind so you can write. Glass is smooth and doesn't scrape the chalk, so it leaves no marks.
You use la tiza (chalk) with a chalkboard to write or draw. It is commonly used in classrooms to write notes or draw diagrams.
YES. by writing with chalk the dust particles will chip off without you knowing. thats why when you write with chalk and you try to smear it, it is now on your hand..sorry its confusing. -SP
to write on.TO HOLD CHALK!!!!! and do math homework so you don't waste paperNO!!!! Its for very wise uses such as school home collage etc.
magnus i think...
no
Chalk
because we can use it to write on chalk boards
a place that there is a chalk celebration and they write in chalk everywear iv been in one
To draw or write something using chalk.