Situation, Result, and Science Behind ItWhen you place the powdered milk in a glass with hot water, the milk dissolves and forms a milk solution. The science behind it is dissolution — the hot water helps break down the powdered milk so it mixes evenly with the water.When you place the plastic bag with water inside the cooler, the water stays cold or becomes cooler. This is because of heat transfer — the cooler prevents heat from entering, so it keeps the water’s temperature low.When you see the sun in the morning, the surroundings become brighter and warmer. This happens because the sun emits light and heat energy, which lights up the environment and raises the temperature.