File:Homer_E_Newell_NASA.jpg · Wikimedia Commons · See Wikimedia Commons
Key facts
- Other names
- Chalkboard, writing-board
- Uses
- Reusable writing surface on which text or drawings are made
via Wikipedia infobox
Wikidata facts
- Image
- MEK II-426.jpg
Show 1 more fact
- Commons category
- Chalk sticks
Sources (2)
via Wikidata · CC0
~6 min read
Article
A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, better known as chalk.
Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.