A unit on levers and simple machines could be tied into digging holes and how the shovel is used as a lever and a simple machine.
(A unit on levers and simple machines; could be tied; ) (A unit on levers and simple machines; into digging; holes) (the shovel; is used; as a lever and a simple machine)
A unit on levers and simple machines A unit on levers and simple machines the shovel
could be tied into digging is used
holes
as a lever and a simple machine