The black board is known as such because in earlier times slate was used (which is black) instead of the "color green" stuff that you see now. The materials changed but the name stuck.
The black board is known as such because in earlier times slate was used (which is black) instead of the "color green" stuff that you see now. The materials changed but the name stuck.
if you meant color instead of green color it would be black
Black added to any color will produce a darker shade of the color. So, if you add green to black, you would get a darker and darker green until you end up with what appears to be black.
The original "Black board" was made from slate that was indigo. (Black) During the late 19th century, it was stated by psychologists that green was a better color to look at and inspired one to feel at ease. An experiment was conducted and it was concluded that 70% of the students that had a C average, increased their average to a B with the green board in the room as opposed to the black one. The result was a move to the current and future boards purchased would be green and the black ones phased out.
black
black
Neon green goes WITH black
it makes a darker green
Black
When you mix black and yellow, you get the color green.
The color of the wires in the electrical circuit are green, black, and white.
no and deffently not black