Topic: Make Blackboard Chalk
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Answers to Common Questions
How to Clean Blackboard Chalk
Blackboards and chalk have a truly symbiotic relationship. One is practically useless without the other. But as in many close relationships, one can rub off on the other, so as to mar utility. Getting your blackboard clean after chalk has b... Read More »
Source: http://www.ehow.com/how_5936196_clean-blackboard-chalk.html?ref=T...
How to Make Blackboard Chalk
While blackboard chalk is pretty inexpensive, it is a lot of fun to make your own. When you make your own chalk you can use a variety of molds to form interesting shapes. Cardboard toilet paper cores, small matchboxes and candy molds make e... Read More »
Source: http://www.ehow.com/how_5191558_make-blackboard-chalk.html
Why is chalk used on blackboards?
Well you see, as the chalk rubs against the blackboard bits of it get left behind, showing you what your teacher thinks your cursive should look like, or a new trick when dividing big numbers. Read More »
Source: http://wiki.answers.com/Q/Why_is_chalk_used_on_blackboards
Featured Content:
Make Blackboard Chalk
While blackboard chalk is pretty inexpensive, it is a lot of fun to make your own. When you make your own chalk you can use a variety of molds to form interesting shapes. Cardboard toilet paper cores, small… More »
Difficulty:
Easy
Source: www.ehow.com
More Common Questions
Answers to Other Common Questions
Chalk is comprised of calcium sulfate. Specifically, it comes in the form CaSO4.2H2O, which is the dihydrate often known as gypsum.
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Source: http://wiki.answers.com/Q/Why_chalk_dust_adhere_to_the_surface_of...
Don't know. Ho one is exactually sure because it isn't very popular. :(
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Source: http://wiki.answers.com/Q/Who_invented_dustless_blackboard_chalk
In the past, blackboard chalk was derived from a sedimentary rock, named chalk, which consisted mostly of calcium carbonate. Today, gypsum is the preferred material for blackboard chalk, as it is more readily available and simpler to use. S...
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Source: http://www.answerbag.com/q_view/2049851
Chalk is a naturally occurring compound known as calcium carbonate. James Pillans, a Scotsman, is commonly cited as inventing both colored chalk and the blackboard. A teacher at West Point Military Academy named George Baron is credited as ...
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Source: http://www.answerbag.com/q_view/2226167
Blackboards are a time-tested communications medium still used in many settings. Despite their low-tech nature, there are proper ways to clean and remove old chalk from blackboards so as to prolong their life and not damage them.
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Source: http://www.ehow.com/facts_7261395_do-remove-old-chalk-blackboards...
hurry up and answer
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Source: http://wiki.answers.com/Q/How_come_ants_cross_chalk_on_blackboard...
