- Extensive quantity
- Its magnitude is additive for subsystems, e.g. volume, entropy, number of moles, displacement, induction, strain.
- Intensive quantity
- Its magnitude is independent of the size of the system, e.g. temperature, pressure, chemical potential, electric field, magnetic field, stress
- Conjugate quantities
A pair of variables that their product has the dimension of energy or energy per unit volume, e.g. temperature and entropy, pressure and volume.
See the wikipedia.