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Word index 6

Physical science

TermDefinition
Heat the quality of being hot; high temperature.
Thermal Energy Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules.
thermal Conductor is the property of a material to conduct heat. It is evaluated primarily in terms of Fourier's Law for heat conduction.
convection the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise.
radiation the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
specific heat the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
temperature the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.
thermal expansion Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, through heat transfer.
absolute Zero the lowest temperature that is theoretically possible, at which the motion of particles that constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to –273.15°C or –459.67°F.
expansion joint a joint that makes allowance for thermal expansion of the parts joined without distortion.
thermostat a device that automatically regulates temperature, or that activates a device when the temperature reaches a certain point.
bimetallic strip a temperature-sensitive electrical contact used in some thermostats, consisting of two bands of different metals joined face to face along their lengths. When heated, the metals expand at different rates, causing the strip to bend.
thermometer an instrument for measuring and indicating temperatu
Created by: Deasia_glover
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