Conduction- in heat, energy transfer from particle to particle within certain materials, or from one material to another when the two are in direct contact. in electricity, the flow of charge through a conductor.
Convection- a means of heat transfer by movement of the heated substance itself, such as by currents in a fluid.
Radiation- energy transmitted by electromagnetic waves. the particles given off by radioactive atoms such as uranium.
Joule- the SI unit of work and of all other forms of energy. one joule (symbol J) of work is done when a force of one newton is exerted on an object moved one meter in the direction of the force.
Calories- a unit of heat. one calorie (symbol cal) is the heat required to raise the temperature of one gram of water one Celsius degree. one calorie (with a capital C) is equal to one thousand calories and is the unit used in describing the energy available from food.
1st Law of Thermodynamics- allthe laws of nature are the same in all uniformly moving reference frames.