Thermal energy is the energy that a system or object possesses due to the random movement of its particles. When more particles are present, there is more movement, which results in more thermal energy. More » Science Physics Thermodynamics

Solar energy has been used by humans for 2,700 years. Originally, glass lenses were used to make fire with the sun's rays. According to the U.S. Energy Information Administration, the first recorded use of a solar therma... More » Science Physics Thermodynamics

One fact for kids about solar energy is that it is energy harvested from the sun. When the sun's rays, also known as solar radiation, reach the Earth, the energy is converted using appropriate technology into heat and el... More » Science Physics Electricity
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Thermal energy is made by the movement of particles within an object or system. The thermal energy of an object, and thus the temperature of an object, increases as its molecules move more quickly. More » Science Physics Thermodynamics

Thermal energy is the movement of particles within matter and is found in the sun, magma, heated water and even the human body. Heat represents the transfer of thermal energy between matter. More » Science Physics Thermodynamics

The transfer of heat from an object's surroundings increases the energy of the particles that make up the object. Raising the kinetic energy of a particle increases its movement. More » Science Physics Thermodynamics

The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecules and thermal energy is the total kinetic energy of all particles in a given substance. In other wor... More » Science Physics Thermodynamics