Four-stroke engine

The process of compressing fuel and air

• compression

• pressure

• exhaust

• ignition

A force caused by pushing against something

• compression

• ignition

• pressure

• exhaust

An opening where spent fuel is released

• intake

• exhaust valve

• cylinder

• head

To make something burn or catch fire

• ignite

• compress

• exhaust

• press

The process of releasing spent fuel

• intake stroke

• compression stroke

• power stroke

• exhaust stroke

The four-stroke engine works by heating fuel and air in a...

• cylinder

• head

• crankshaft

• camshaft

During the first stroke the ............. valve lets fuel and air into the cylinder.

• intake

• cylinder

• compression

• head gasket

The intake valve closes during the ............. stroke.

• compression

• exhaust

• intake

• power

The mixture of air and fuel ................. during the power stroke.

• ignites

• releases

• goes

• takes

The final stroke ....................... gas.

• ignites

• releases

• goes

• takes