Chalk
Meter is used in finding the width of the blackboard.
Blackboard can be any shape you want. Most blackboards are rectangular.
A typical blackboard is about 2 meters in length.
No
You write on a blackboard.
Chalk
Chalk
Matilda wrote "I'm big, you're little. I'm right, you're wrong, and there's nothing you can do about it" on the blackboard.
Chalk is used on the black board because chalk is easy to write with on a black board.
M.Hamel wrote "Vive la France!" on the blackboard before dismissing the last class.
sabbourah sawda'a = سبورة سوداء or simply you can say sabbourah
To write and draw with chalk for educational, personal, entertainment, or commercial uses.
It is easy to write on a rough blackboard. The friction between the chalk and the rough surface is what allows the chalk to leave behind the chalk dust that we see. Actually it would impossible to write on a theoretically smooth blackboard. Without the friction, the chalk would not leave any residue!
Blackboard Inc. was created in 1997.
The population of Blackboard Inc. is 1,780.
advantages and disadvantages of blackboard