Question

a measure of the average kinetic energy of the molecules making up a substance is
multiple choice
caloric content.
relative warmth.
temperature.
heat.

Explanation:

• Caloric content refers to the energy in food, not molecular kinetic energy.
• Relative warmth is a subjective term, not a scientific measure.
• Heat is the transfer of thermal energy, not the measure of average molecular kinetic energy.
• Temperature, according to kinetic - molecular theory, is directly related to the average kinetic energy of molecules ($K.E.=\frac{3}{2}kT$, where $K.E.$ is average kinetic energy, $k$ is Boltzmann's constant, and $T$ is temperature in Kelvin).

Answer:

temperature.