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?

Question

options:

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.

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

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.

Answer 1

The statement that best explains why the cold milk and hot chocolate eventually blend and reach an even temperature is:

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

This principle describes how thermal energy transfers, leading to the mixing of the two liquids until thermal equilibrium is reached.