blackboard
Sign in to saveA 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.
AI overview
A blackboard is a reusable writing surface where you can write or draw using chalk, which is made from calcium sulphate or calcium carbonate. It matters because it allows you to easily write, erase, and rewrite information repeatedly, making it practical for teaching, presentations, and sharing ideas.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Laboratory equipment.name
- Blackboard
- Laboratory equipment.image
- Homer E Newell NASA.jpg
- Laboratory equipment.caption
- NASA scientist Homer E. Newell Jr. explaining principles of altitude, pressure, and temperature,
- Laboratory equipment.other_names
- Chalkboard, writing-board
- Laboratory equipment.uses
- Reusable writing surface on which text or drawings are made
via Wikipedia infobox
Article
9 sectionsContents
- Design
- Chalk sticks
- Issues with use
- Etymology and history
- Gallery
- See also
- Notes
- Further reading
- External links
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Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.