What IS a Big Rig A huge truck drives down the highway It is a big rig O O OD a LL ARLE
A big rig has two main parts The front is called a tractor The tractor pulls a trailer This is a tractor The trailer is behind it 9 to
The tractor needs a powerful engine to pull its load The engine changes fuel into energy that turns wheels A big rig has a diesel engine This is a diesel engine It burns a type of fuel called
