Social Sciences, asked by Vedikaj2308, 2 days ago

What is a blackboard made of??

Answers

Answered by waqqasnasir77

Answer:

A blackboard (also known as 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.

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Answered by AngelPurswani

Answer:

sticks of calcium sulphate or calcium carbonate

Explanation:

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