The high temperatures created by the use of baked coal, known as coke, give steel its strength and flexibility.
Because they're BAKED!
Coal Bunker, Coal scuttle, Coal hod
coal seam
A coal seam
A soft brown coal with less moisture is called bituminous coal.
Metamorphosed coal is called Anthracite.
Metamorphosed coal is called Anthracite.
coal ship
small pieces of coal are called slack. Thank you!
It is called that because in those days coal could get you alot of money, so did gold. So it was called "black gold".
A layer of coal under the ground is sometimes called a coal bed.