Heat can be transferred in three main ways:
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Conduction: This is the transfer of heat through a solid material without any movement of the material itself. It occurs when two objects at different temperatures are in direct contact. For example, if you touch a hot stove, heat transfers from the stove to your hand through conduction.
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Convection: This is the transfer of heat through the movement of fluids (liquids and gases). In convection, warm fluid rises while cooler fluid sinks, creating a circular motion that transfers heat. A common example is boiling water, where the hot water at the bottom rises to the top while cooler water descends to the bottom.
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Radiation: This is the transfer of heat in the form of electromagnetic waves, typically infrared radiation. Unlike conduction and convection, radiation does not require a medium and can occur in a vacuum. An example of radiation is the heat from the sun warming your skin when you are outside on a sunny day.