Question

When you add cold milk and hot chocolate, they will slowly blend as the cooler liquid mixes with the warmer liquid. Eventually, the heat will be spread out evenly through the entire liquid. Which statement best explains why this happens?(1 point)
Responses

The molecules of the two liquids form chemical bonds to spread energy.
The molecules of the two liquids form chemical bonds to spread energy.

The liquids attract each other because the densities of the liquids are the same.
The liquids attract each other because the densities of the liquids are the same.

Cold liquids rise and hot liquids sink making the liquids mix.
Cold liquids rise and hot liquids sink making the liquids mix.

Heat always moves from areas of higher temperature to areas of lower temperature.
Heat always moves from areas of higher temperature to areas of lower temperature.

Answer 1

Heat always moves from areas of higher temperature to areas of lower temperature.

Thermal energy flows from the hot chocolate to the cold milk (by conduction and convection), causing the temperatures to equalize until the mixture is at the same temperature.