When a substance heats up, the rise in temperature makes these particles move faster and bump into each other. Thermal energy is the energy that comes from the heated up substance. The hotter the substance, the more its particles move, and the higher its thermal energy. The hot chocolate has thermal energy from its vibrating particles. When you pour some cold milk into your hot chocolate, some of this energy is transferred from the chocolate to the particles in the milk.
So what happens? Your hot chocolate cools down because it lost some of its thermal energy to the milk. The tea has thermal energy from its vibrating particles. When you pour some cold milk into your hot tea, some of this energy is transferred from the tea to the particles in the milk. As cold particles heat, they contain more energy and so vibrate and separate. Some matter changes from solid to liquid to gas as its particles heat, vibrate and separate.
Boiling a kettle is an example of both thermal and kinetic energy. Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature. Kinetic energy is the energy of a moving object. As thermal energy comes from moving particles, it is a form of kinetic energy.
Ever burnt your hand from picking up something hot? Nuclear Fuels. Acid Rain. Climate Change. Climate Feedback. Ocean Acidification. Rising Sea Level. New York: Pearson, , Ch. Contact us About us Privacy policy Terms of use. Thermal energy is the energy that is generated and measured by heat.
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