Water evaporates when it absorbs heat energy, which increases the kinetic energy of its molecules. This energy allows the molecules to escape from the liquid state into the gas phase as water vapor.
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Thermal equilibrium is the state in which two objects in contact no longer exchange heat because they have reached the same temperature.
Radiation is the transfer of heat through electromagnetic waves. It doesn’t require a medium, meaning heat can travel through a vacuum, like from the Sun to Earth.
A clinical thermometer is a device used to measure body temperature. It typically has a narrow temperature range and can be digital or liquid-in-glass.
An infrared thermometer measures temperature by detecting infrared radiation emitted by objects. It allows non-contact temperature measurement, making it useful for both industrial and medical purposes.