Blackboard
id:
blackboard-181-4063192
title:
Blackboard
text:
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, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
brand slug:
wiki
category slug:
encyclopedia
description:
Reusable writing surface
original url:
https://en.wikipedia.org/wiki/Blackboard
date created:
2003-05-27T09:34:47Z
date modified:
2024-09-05T19:12:50Z
main entity:
{"identifier":"Q235585","url":"https://www.wikidata.org/entity/Q235585"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/e/e8/Homer_E_Newell_NASA.jpg","width":2000,"height":1483}
fields total:
13
integrity:
16