The four laws of thermodynamics define fundamental physical quantities (temperature, energy, and entropy) that characterize thermodynamic systems. The laws describe how these quantities behave under various circumstances, and forbid certain phenomena (such as perpetual motion).
The four laws of thermodynamics in informal terms are:
Zeroth law of thermodynamics: states that if each of two systems is in thermal equilibrium with a third, they are in thermal equilibrium with each other. This law helps define the notion of temperature.
First law of thermodynamics: states that energy cannot be created or destroyed. Equivalently, perpetual motion machines of the first kind are impossible.
Second law of thermodynamics: states that the entropy of a closed system tends to increase to its maximum value (entropy is the amount of energy not available for work, sometimes in formerly referred to as disorder or chaos). Equivalently, perpetual motion machines of the second kind are impossible.
Third law of thermodynamics: reduces to the conclusion that absolute zero can never be reached in a finite amount of time.
I bring this up because it seems that some creationists like to posit that the second law of thermodynamics refutes evolution. They grasp at this straw of disingenuous misinformation by claiming that since entropy increases in a closed system, evolution or the emergence of an ordered universe is impossible, requiring an outside creator.
As a solid rebuttal, it is easy to point out that the earth, bombarded by energy from the sun, is not a closed system, and though our observed universe is probably indeed a closed system (if that means anything), the second law of thermodynamics applies only to the energy of particles, which did not exist at the earliest stage of the Big Bang. The second law of thermodynamics is irrelevant to the topic of evolution, and completely useless as a theistic argument.
Another question that comes to mind, since you obviously imagine that the Second law, which is derived from within the universe, applies to the universe as a whole, does the First law also apply? Since the First law states that energy/matter cannot be created, doesnt that rule out the creation of the universe?

