We just learned about the Coupling on a locomotive.
Let's learn a little more about how most cars work.
The biggest most important part of the car is the Engine Block, sometimes called the cylinder block under the hood.
This is a big solid piece of metal in the car.
The engine block does not move, but it has parts hooked into it that move to help make the car go.
Because the moving engine is so powerful, this block has to be made in a cast or mold.
That means they take hot liquid metal, pour it into something to hold it's shape and then let it cool.
After it is cooled the block is very strong and can hold onto other pieces that are moving very fast and pushing very hard.
(from: wikipedia - engine block)
Kid Facts - Blast from the past: Ball Valve
