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thermal energy

thermal energy
Noun

This term is used primarily in scientific and technical contexts to describe the total kinetic energy of particles within a substance. It is distinct from temperature, which measures the average kinetic energy; while temperature describes the intensity of heat, thermal energy describes the total quantity.

As a mass noun representing a physical property, it is treated as uncountable. It does not take a plural form and cannot be counted with numbers, requiring quantifiers such as "amount of" or "level of" when referring to quantity.

Meanings

Nounthermal energy

The internal energy of a system due to the kinetic energy of its constituent atoms and molecules, which manifests as heat.

Examples

The sun provides the earth with a vast amount of thermal energy.

The sun provides the earth with a vast amount of thermal energy.

Wait, does the water absorb thermal energy faster than the sand?

Waitdoes the water absorb thermal energy faster than the sand?

Thermal energy is transferred from the hotter object to the cooler one.

Thermal energy is transferred from the hotter object to the cooler one.
I wonder how much thermal energy is released during this chemical reaction.
Geothermal power plants harness thermal energy from deep within the earth.

The insulation in the walls prevents thermal energy from escaping during winter.

The insulation in the walls prevents thermal energy from escaping during winter.

As the molecules move faster, the total thermal energy of the system increases.

As the molecules move fasterthe total thermal energy of the system increases.
We need to find a way to store thermal energy more efficiently for home heating.
The friction between the two surfaces converted kinetic energy into thermal energy.

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Last Updated: May 2026Report an Error