when write with wet chalk on black board,at first writing is barely visible.slowly it become visible.explain?

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when write with wet chalk on black board,at first writing is barely visible.slowly it become visible.explain?

2007-01-01 04:59:49 · 3 answers · asked by mahy 1 in Science & Mathematics ➔ Chemistry

3 answers

The chalk dries. And when it becomes more solid again, it works better.

2007-01-01 05:03:10 · answer #1 · answered by smoothsoullady 4 · 0⤊ 0⤋

Gradually as we write the chalk dries up and the moistness lessens. It starts to rgain its solidness. Hence the things we write or draw become more visible with time and use.

2007-01-01 13:10:25 · answer #2 · answered by Anonymous · 0⤊ 0⤋

sophisticated factor. do a search on to google and yahoo. just that may help!

2014-11-20 04:19:45 · answer #3 · answered by crystal 3 · 0⤊ 0⤋