heat transfer

• solid, liquid, gas = these atoms and molecules are always in motion and they have kinetic energy
• thermal energy = refers to the energy possessed by an object or system due to the movement of particles within the object or the system
• heat = the energy that transfers from a body with higher temp to a body with a lower temp
• heat SI Unit = joules
• heat = the total energy of the motion of the molecules of a substance
• temperature = refers to the relative hotness or coldness of an object
• temperature SI unit = kelvin
• temperature = celcius, fahrenheit, kelvin
• temperature = can be measured using thermometer
• temperature = measure of the average energy of the motions of the molecules in the substance
• the temperature wherein thermal energy is exchanged between objects due to their temperature differences
• methods of heat transfer = conduction, convection, radiation
• conduction = takes place between objects that are in direct contact with each other
• conduction = this method of heat transfer is most effective in solids
• conductors = materials that allow thermal energy to readily flow through them
• insulators = materials that transfer transfer heat poorly
• convection = transfer of energy by the rising or sinking of matter due to density differences
• method of heat transfer through the circulation of liquid and gas = convection
• cooler = denser = sinks
• heated = less dense = rise
• radiation = heat moves through empty space
• radiation = heat transfer that has no medium
• radiation = transfers heat by means of electromagnetic waves
• conduction = transfer of energy through adjacent molecules
• radiation = emission of electromagnetic waves
• convection = movement of hot fluid