How Do You Play Around The World With Math Facts Reasons Why Chalkboards Are Green

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Reasons Why Chalkboards Are Green

The blackboard was invented by James Pillans. He made it in 1801 and gave it the name slate. It is made with the stone called slate. Chalk made of calcium sulfate is what you use, so you can write on it. In the early years of the 20th century it was used in many schools. It came in different colors like green, brown and black. In the 1950s most whiteboards were green in color, as research has revealed that green is the color that gives a soothing effect to the eyes. The green color also prevents the eyes from getting tired.

1. The first answer to the question of why the blackboard is green is because research revealed that human eyes are very sensitive to anything that is green in color. This is one of the main reasons why most board builders preferred to make them green instead of black. Studies also showed that the retina of the eyes has two types of cells for light, namely rods and cones. There are about one hundred and twenty million rods in our eyes. The rods are what help us develop scotopic visions. This vision helps us see in a bright and dark room. The part of our eye that recognizes colors are the cones. There are seven million cones and some of them are green. Green cones are very sensitive to light and let our eyes have the best resolution, when we are watching or reading.

2. The second answer to the question why the blackboard is green is because in many cultures of the world, this color is a symbol of hope. It is a color that most teachers also associate with growth. In terms of education, it means that study should have a large part in the growth process of each individual.

3. The third answer to the question why the blackboard is green is because of the rise of many groups around the world that advocate for the protection of the environment. There was a time when the green movement became popular. All these movements also campaigned for the use of the color green.

4. The fourth answer to the question of why the blackboard is green is because green allows the rooms to have a minimal image of authenticity. The chalk marks on green slates are also not as obvious as on black slates. Then people started calling it slates instead of blackboards because the color changed and green became the official color in the 1950s.

Today chalkboards are used more than whiteboards because of the concern about the dust that the chalks give off, but there are still some schools and institutions that use them because they are no longer made of blackboard and now there are chalks that don’t come off powder

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