As more heat flows into the mixture of ice and water, the ratio of solid ice to liquid water gradually changes and the fraction of liquid water increases.
(more heat; flows; into the mixture of ice and water) (the ratio of solid ice to liquid water; gradually changes; T:As more heat flows into the mixture of ice and water)
more heat the ratio of solid ice to liquid water
flows gradually changes
into the mixture of ice and water
T:As more heat flows into the mixture of ice and water