chalk

27 07, 2017

Parchment and the history of books

By |2019-06-01T13:54:12-07:00July 27th, 2017|Literature, West Asia|Comments Off on Parchment and the history of books

Pseudo-Apuleius, Herbarium (about 600 AD, now in Leiden) Papyrus came first Scribes carved the first writing on wet clay tablets, but soon after that, about 3000 BC, the Egyptians invented papyrus. By about 500 [...]

21 07, 2017

Rangoli – Colored patterns – Hinduism project

By |2018-04-16T10:32:23-07:00July 21st, 2017|India, Religion|Comments Off on Rangoli – Colored patterns – Hinduism project

A woman creates a pattern with colored sand for Diwali All over India, women use colored rice flour or wheat flour, or colored sand, to make patterns on the ground to celebrate holidays like Diwali. People [...]

1 06, 2017

Calcium project – Chalk and lemon juice – Chemistry

By |2019-02-26T05:52:48-08:00June 1st, 2017|Chemistry|Comments Off on Calcium project – Chalk and lemon juice – Chemistry

Need chalk? Buy chalk Chalk has calcium in it Take a piece of regular white chalk, like for writing on a blackboard. Make sure the chalk is calcium carbonate like [...]

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