Question

find the word that matches the definition: sum of the kinetic energies of all the particles that make up an object

Explanation:

Thermal energy is defined as the sum of the kinetic energies of all the particles that make up an object. Thermal expansion is about the change in size due to temperature. Hypothermia is a medical condition related to low body temperature. A thermal conductor is a material that conducts heat well.

Answer:

thermal energy