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At its inception, blackboards were only black. Although many now are green, the name still sticks. It's just like a permanent resident's ID card, called the "green card." It's not green anymore but white, but it is still referred to as a green card.
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Are blackboards magnetic?
noAnswerIt depends upon what they are made of. Some blackboards (or 'chalkboards', as many are actually dark green!) have a metal backing which allow magnets to be stuck to them.
What are blackboards consisted of?
Blackboards are made of slate.
What is the duration of Blackboards?
The duration of Blackboards is 1.42 hours.
What rock is used for blackboards?
Blackboards were originally made of slate. Modern "blackboards" are white and are made of synthetic materials.
When was Blackboards created?
Blackboards was created on 2000-10-25.
What type of rock are blackboards made of?
Slate is the type of rock to make blackboards.
Why is a blackboard is green?
In recent years, green colored boards have largely replaced blackboards. Studies reveal that green color relaxes the eyes and prevents fatigue. Furthermore, the human eye is highly sensitive to the green color, and for this reason, the use of green boards has extensively increased.
What are the release dates for Blackboards and Blackmail - 1917?
Blackboards and Blackmail - 1917 was released on: USA: 30 July 1917
What do you use chalk for?
Writing on blackboards
What actors and actresses appeared in Blood and Blackboards - 2006?
The cast of Blood and Blackboards - 2006 includes: Perry King as himself Merrie Lynn Ross as herself
How do you spell blackboards in Spanish?
pizarra o pizzarrón
What are the release dates for Blackboards and Bullies Are Your Kids Safe - 2009 TV?
Blackboards and Bullies Are Your Kids Safe - 2009 TV was released on: USA: 24 October 2009
