| A | B |
|---|
| Temperature | Measure of how hot or how cold |
| Spontaneous heat flow | Hot to cold |
| Non-spontaneous heat flow | Cold to hot |
| Calorie | 1000 calories |
| Conduction | Heat transfer by direct contact |
| Convection | Heat carried by a fluid |
| Radiation | Heat transfered through outer space |
| Thermo 3rd Law | Can't achieve absolute zero |
| Thermo 2nd Law | Heat flow cold to hot requires work |
| Thermo 1st Law | Energy is conserved |
| Heat engine | Converts heat into work |
| Waste heat | Thermal energy not converted to work |
| Steam engine | External combustion |
| Gasoline engine | Internal combustion |
| Heat pump | Device that reverses the normal flow of energy |
| Refrigerant | Fluid that vaporizes and condenses inside a heat pump |
| Cool air | Sinks |
| Hot air | Rises |
| Insulator | Poor conductor of heat |
| Calorimeter | Measures changes in thermal energy |
