instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of what exist? Answer: equilibrium
answer:
Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of equilibrium exist.


question:
Question: Because trees add water vapor to air, cutting down forests leads to longer periods of what? Answer: drought
answer:
Because trees add water vapor to air, cutting down forests leads to longer periods of drought.


question:
Question: Soil forms where land areas are what? Answer: flat
answer:

Soil forms where land areas are flat.


