Question

matter and temperature quick check
which option is a measure of the average kinetic energy of the particles in a substance? (1 point)
○ heat
○ thermal energy
○ temperature
○ phase

Explanation:

• Heat: It is the transfer of thermal energy between substances due to a temperature difference. It is not a measure of the average kinetic energy of particles in a substance.
• Thermal energy: It is the total kinetic and potential energy of the particles in a substance. It depends on the mass, temperature, and state of the substance. It is not the average kinetic energy.
• Temperature: According to the kinetic - molecular theory, temperature is directly related to the average kinetic energy of the particles in a substance. As the average kinetic energy of particles increases, the temperature of the substance increases.
• Phase: It refers to the state of matter (solid, liquid, gas). It is not a measure of the average kinetic energy of particles.

Answer:

temperature