Question

How the molecules could be hot

Answer 1

The higher the energy, the higher the temperature. The energy absorbed by the molecules on a body make the molecules of the body agitate and move faster, in a chaotic way. Colder bodies have molecules that move slower with less chaos. Molecules in a solid can not move freely but they agitate faster.

Answer 2

As the water molecules bump into the food Color molecules the food colour will move around. When we add energy to an object its atoms and molecules move faster increasing its energy of motion or heat.Even object which are very cold have some heat energy because their atoms are still moving.

(I think it can help u)