How did Steam Engines work in the 19th century (using cole)?

Question: How did Steam Engines work in the 19th century (using cole)!?

Hi,
Can someone please explain it to me, I have tried going on howstuffworks!.com and other websites, but I need someone to make it simple!. I will be tested on this!.!.!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Coal is used to heat water contained in a closed tank called a "boiler!." The water turns to steam which generates tremendous pressure!. Steam is sent to a piston in a cylinder!. This causes the piston to move in its cylinder!. When the steam has pushed the piston a certain distance the steam is released!. Through a mechanical apparatus, the piston is returned to its original position!.
This back-and-forth motion of the piston in a cylinder can turn a wheel or shaft, powering the machine!.Www@QuestionHome@Com

Steam engines remain relatively unchanged over the years at least in principle!. Coal or wood fired engines heat water in a boiler and convert water to steam!. Steam expands and continues to expand the hotter it gets!. This expanding gas forces a piston forward on a crankshaft causing the engine to convert the rotational force into power!.Www@QuestionHome@Com