A form of energy
Measured in calories or joules
There is no "coldness" energy
Any object with temperature above zero kelvin has energy
Avg. kinetic energy of the particles
Measured in C, F, K
"Hot" and "Cold" are relative terms
Absolute zero is zero kelvin
Conduction - Requires direct contact or tarticle to particle transfer of energy; usualy occurs in solids
Convection - heat moves in currents; hot air rises and cold air falls; only occurs in fluids
Radiation - heat waves travel through empty space, no matter needed; sun
A system is in thermal equilibrium when all of its parts are at the same temperature
Heat transfers only from high to low temperatures and only until thermal equilibrium is reached
The study of changes in thermal properties in matter
Follows Law of Conservation of Energy
1st Law - the total increase in the thermal energy of a system is the sum of the work done on it and the heat added to it
2nd Law - natural processes tend to increase the total entropy (disorder) of the universe.