Once water is heated to 100 0 C (212 0 F) at sea level, it begins to boil, but it requires additional energy to convert from a liquid to a gas without changing temperature.
(water; is; heated to 100 0 C (212 0 F) at sea level) (it; begins; ) (it; to boil; ) (it; requires; additional energy; to convert from a liquid to a gas without changing temperature)
water it it it
is begins to boil requires
heated to 100 0 C (212 0 F) at sea level
additional energy to convert from a liquid to a gas without changing temperature