Question

entropy tells us that systems will __________ in disorder until __________ is reached.

Explanation:

Entropy is a concept in thermodynamics (a sub - field of Physics, which is a Natural Science). The second law of thermodynamics states that the entropy (a measure of disorder) of an isolated system always increases. Systems tend to move towards a state of maximum disorder. The term for increasing in disorder is "increase" and the state of maximum entropy (where no more increase in disorder can occur in an isolated system) is called "equilibrium".

Answer:

increase; equilibrium