Englishfor English speakers
blackboard
Noun
—
A blackboard is a large, flat piece of slate, typically hung in a classroom and written on with erasable chalk.
The teacher wrote the day's lesson on the blackboard.
chalk
Noun
—
Chalk is a soft, white, powder-like limestone.
The men mine chalk in the hills near my house.
—
Chalk is a piece of chalk, or more usually, processed compressed chalk, that is used for drawing and for writing on a blackboard; teachers at school may use chalk to write on a blackboard.
John wrote his name on the blackboard with chalk.
There are many pieces of chalk on the floor.
The shop at the corner of the street sells many chalks.
chalk
Verb
—
To put chalk on something, such as the tip of a billiards cue.
—
To write something using chalk; this is often done on a blackboard.
—
To use powdered chalk to put the lines on a sports field.