<human>:  What are the three principles of thermodynamics?
<bot>: 
1. The First Law of Thermodynamics states that energy can neither be created nor destroyed, only transformed from one form to another.
2. The Second Law of Thermodynamics states that the entropy of a closed system tends to increase over time.
3. The Third Law of Thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.