| A | B |
|---|
| crankshaft | Changes the pumping motion of the pistons into spinning motion. |
| camshaft | the mechanical brain of an engine responsible for coordinating all the major parts |
| intake valve | a valve that opens to let the fuel mixture enter |
| exhaust valve | a valve that opens to allow the exhaust fumes to be pushed out. |
| Piston | soup can shaped device that is forced downward by the combustion explosion and then turns a crankshaft via a connecting rod |
| combustion | a controlled burning or explosion within a combustion chamber casued by igniting a gaseous vapor with a spark |
| valves | doors to the combustion chamber |
| timing belt | connects a camshaft and a crankshaft and holds them in the same relative position to each other at all times. |
| cylinder head | a solid metal piece that fits on top of an engine block |
| internal combustion | fuel burns inside an engine |
| angular momentum | the spin motion |
| block | large casting of iron or aluminum with small passageways for oil and water circulation |
| cylinders | large holes or tubes built into the engine block. Piston slide up and down in these. |
