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Heat Transfer

Energy - Part 2

thermal energy the energy a an object has due to the motion of its particles
convection the process by which energy is transferred in gases and liquids, occurring when a warmer less dense area is pushed up by a cooler more dense area. (currents/circles)
radiation energy that travels across distances in the form of electromagnetic waves
conduction the process by which energy is transferred from a warmer object to a cooler object by means of physical contact. (touch)
temperature a measure of the average amount of kinetic energy of the particles in an object
thermometer a tool used for measuring temperature
kinetic theory of matter states that all matter is made of particles in motion
thermal expansion a property that allows most matter to expand when their temperature rises
specific heat the amount of energy required to raise the temperature of one gram of a substance by one degree Celsius.
heat transfer the flow of energy from an object at a higher temperature to an object at a lower temperature
thermal conductor a material that transfers heat easily ( lets heat out)
thermal insulator a material that does not transfer energy easily ( holds heat in)
calorie the amount of energy needed to increase the temperature of one gram of water by one degree Celcius
joule a unit used to measure energy and work. One calorie is equal to 4.18 joules of energy.
transparent light easily pass through
opaque light can not pass through
translucent some light can pass through
electrical conductors a medium through which an electric current will flow
electrical insulators a material that lacks movable electric charges; therefore it does not allow electricity through
electromagnetic waves a wave of vibrating electric and magnetic fields
contraction to reduce in size
Created by: Ms. Long 6