Boiling is when a liquid is bubbling, the liquid is turning into a gas inside the liquid, at its boiling point.
(Boiling; is; when a liquid is bubbling, the liquid is turning into a gas inside the liquid, at its boiling point) (a liquid; is bubbling; ) (the liquid; is turning; into a gas inside the liquid)
Boiling a liquid the liquid
is is bubbling is turning
when a liquid is bubbling, the liquid is turning into a gas inside the liquid, at its boiling point
into a gas inside the liquid