The water then exists in the solid phase as ice. In spring, when the temperature rises, the ice melts and changes from the solid to the liquid phase. The phase transition occurs as a result of energy exchange with the environment. The melting of ice to water can be easily measured by differential scanning calorimetry.
The price of care for a 4-year-old is less than for an infant, and the cost of care for a school-age child is even less than that. But even home daycare for a school-aged child â the cheapest form of care â costs $9,159 per year in D.C., $5,366 per year in Maryland, and $4,938 per year in Virginia.
Daycare Costs for Preschoolers. Costs for daycare for preschool-age children are generally lower, averaging $8,800 a year ($733 a month). Depending on where you live, you will pay anywhere from $4,460 to $13,185 a year ($371 to $1,100 a month).