Dec. 28, 2020
What Do We Use to Write on the Blackboard?
To write on the blackboard we use the chalks. However, the chalks that we use at school aren’t in gypsum but they’re made in carbonate, like coral, limestone, marble, the skeleton, and the fishbone.
The chalks are made of sulfate. Even if the distinction between these two substances seems to be meticulous, actually they are rather different. They aren’t even constituted of the same elements.
A lot of substances that look different are constituted of the same elements. For example, carbon, hydrogen, and oxygen.
If we combine these elements, changing the percentage, we obtain material substantially different, such as the testosterone, the vanilla, the aspirin, the cholesterol, the vinegar, and the alcohol.
Technically known as calcium sulfate, gypsum is one of the most available minerals in the world. It's extracted from at least 4000 years. Even the inner plastering of the pyramid is made of gypsum. Nowadays, it’s used in a wide range of industrial processes: the most common is the plaster of the buildings.
TWe use chalk to write on the blackboard we use the chalks.
However, the chalks that we use atin school aren’t in gypsum but not made with gypsum. Instead, they’re made inwith carbonate, likesimilar to coral, limestone, marble, the skeleton, and the fishbone.
The chalks are is made of sulfate.
Chalk is always singular.
Even if theThe distinction between these two substances seems to be meticulous, actuallyminors, but in fact they are rather different.
They aredon’t even constituted oftain the same elements.
A lot of substances that look different are constitutedactually made up of the same elements.
For example,Take carbon, hydrogen, and oxygen examples.
IfWhen we combine these elements, changing the percentage, we obtain material substantially different, such as th three, we end up with materials that are substantially different just by changing the percentage of each element. For example, we could have testosterone, the vanilla, the aspirin, the cholesterol, the vinegar, and theor alcohol.
Technically known as calcium sulfate, gypsum is one of the most availablebundant minerals in the world.
It's extracted from at least 4000 years.
Do you mean it was extracted from 4000 years ago or that we could continue to extract it for another 4000 years? Not clear to me.
Even the inner plastering of the pyramid is made of gypsum.
I’m hesitant to correct the word “pastering” as I’m not too knowledgeable in science, but it sounds like an odd use of the word.
Nowadays, it’s used in a wide range of industrial processes: t. The most common is the plaster of theused in buildings.
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What Do We Use to Write on the Blackboard? |
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To write on the blackboard we use the chalks.
|
|
However, the chalks that we use at school aren’t in gypsum but they’re made in carbonate, like coral, limestone, marble, the skeleton, and the fishbone. However, the chalk |
|
The chalks are made of sulfate. The chalk Chalk is always singular. |
|
Even if the distinction between these two substances seems to be meticulous, actually they are rather different.
|
|
They aren’t even constituted of the same elements. They |
|
A lot of substances that look different are constituted of the same elements. A lot of substances that look different are |
|
For example, carbon, hydrogen, and oxygen.
|
|
If we combine these elements, changing the percentage, we obtain material substantially different, such as the testosterone, the vanilla, the aspirin, the cholesterol, the vinegar, and the alcohol.
|
|
Usually, gypsum is known as calcium sulfate and it's one of the most available in the world. |
|
It is extracted from at least 4000 years. |
|
Technically known as calcium sulfate, gypsum is one of the most available minerals in the world. Technically known as calcium sulfate, gypsum is one of the most a |
|
It's extracted from at least 4000 years. It's extracted from at least 4000 years. Do you mean it was extracted from 4000 years ago or that we could continue to extract it for another 4000 years? Not clear to me. |
|
Even the inner plastering of the pyramid is made of gypsum. Even the inner plastering of the pyramid is made of gypsum. I’m hesitant to correct the word “pastering” as I’m not too knowledgeable in science, but it sounds like an odd use of the word. |
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Nowadays, it’s used in a wide range of industrial processes: the most common is the plaster of the buildings. Nowadays, it’s used in a wide range of industrial processes |
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