0
What is the difference between dustless chalk and normal chalk?
Wiki User
∙ 15y ago
* The particles of dustless chalk are very heavy and tend to fall directly to the floor instead of floating in the air, while the particles of the normal chalk floats in the air. * The dustless chalk writes smoothly without scratch, while the normal chalk leaves some scratches on the board. * The dustless chalk does not break easily while the normal chalk breaks easily.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What are the Properties of dustless chalk-piece?
Im not sure about the full properties about the dustless chalk, though I do know how it works. It simple. The compounds in the dustless chalk are heavyer more compound, and stick to themselvs easily. Thus when you earase the chalk binds together and falls to the floor rather than float in the air sufficationg you. Dustless chalk also writes better without as many scrath marks in it and easily cleans.
What is chalk dust made of?
crushed limestone then it is pressurized so that it for like a solid rock but is not as rigid as a rock because you can write with it on a blackboard.
Does Crayola dustless chalk leave an oil residue which is hard to remove?
Yes, the dustless chalk does leave an oily residue which is hard to remove. The reason for this is because in order to rid the chalks of dust producing qualities, moisture needs to be kept in the chalks. I recommend Mr Magic Eraser or a regular cleaner is fine. It needs to be something soapy to break through the grease.
What are the differences between living on chalk and clay?
A big difference between living on chalk and clay is that because of chalk escarpments, chalk areas tend to be hills, wheras clay areas are in between these hills, in the dales, or flat-bottomed valleys. These dales tend to be wetter than the chalk escarpments, although the clay dales do have better drainage than the hills, with meandering streams rather than denes with streams (known as bournes). These are physical differences between the two places An example of a human difference between living on chalk and clay is the fact that on chalk escarpments, the soil isn't that good and is only used for grazing animals-mainly sheep and horses. Clay dales also suffer from bad soil-but this time it is too wet and heavy to plough properly, so the lands is mainly used for grazing too. Another difference is that chalk is good for blocks, and the plots serve as underground reservoirs that can be used for storing water, whereas clay is used to make bricks.
What is the relationship between limestone marble and chalk?
Chalk and marble are forms of limestone. They are all made of Calcium Carbonate.
What is a word that goes before chalk?
colored chalk sidewalk chalk dustless chalk
What are the Properties of dustless chalk-piece?
Im not sure about the full properties about the dustless chalk, though I do know how it works. It simple. The compounds in the dustless chalk are heavyer more compound, and stick to themselvs easily. Thus when you earase the chalk binds together and falls to the floor rather than float in the air sufficationg you. Dustless chalk also writes better without as many scrath marks in it and easily cleans.
What are the properties of chalk?
Im not sure about the full properties about the dustless chalk, though I do know how it works. It simple. The compounds in the dustless chalk are heavyer more compound, and stick to themselvs easily. Thus when you earase the chalk binds together and falls to the floor rather than float in the air sufficationg you. Dustless chalk also writes better without as many scrath marks in it and easily cleans.
What is chalk dust made of?
crushed limestone then it is pressurized so that it for like a solid rock but is not as rigid as a rock because you can write with it on a blackboard.
What is the difference between chalk and sidewalk chalk?
Hello I deleted the answer... Your welcome DB
Does Crayola dustless chalk leave an oil residue which is hard to remove?
Yes, the dustless chalk does leave an oily residue which is hard to remove. The reason for this is because in order to rid the chalks of dust producing qualities, moisture needs to be kept in the chalks. I recommend Mr Magic Eraser or a regular cleaner is fine. It needs to be something soapy to break through the grease.
In what year did Binney and Smith win a gold medal at the St. Louis World Exposition and What was the medal for?
1904 for dustless blackboard chalk which they had invented in 1902.
What material do you need in making a dustless chalk?
First off, common classroom chalk is made from plaster of paris - CaSO4. It of course 'chalks' badly. Grease pencils, and fluid-based writing impliments avoid this side effect.
What is the main difference between crayons and chalk?
they are made with different binders
What is the difference between chalk and coal?
Chalk is a rock composed of animal fossils and coal is a rock composed of plant fossils.
What physical properties could you use to tell the difference between chalk and snow?
Snow is cold Chalk tastes bad.
What is the purpose of chalk?
For kids to get outside. Use their imagination and to eat (crayola dustless)..Also a way for parents to get you away from them after a hard day of work if you're getting on her or his nerves
