Who created the first working steam ship?
Robert Fulton in the 1870s
A steamship used a steam engine to turn a propeller at the back of the ship that pushed the ship through the water. A steam engine usually burns coal to boil water to make steam. The steam builds up pressure in a chamber. This pressure pushes a piston or pistons which turn a crank which rotates a rod with the propeller on the end of it.