Final answer:
Changing the volume of oxygen gas due to a temperature adjustment is a physical change, as it does not affect the gas's chemical composition.
Step-by-step explanation:
When the volume of a sample of oxygen gas changes from 10 mL to 11 mL as the temperature changes, it represents a physical change. This is because the adjustment in volume is a response to the temperature alteration, which is a physical property. The chemical composition of the oxygen remains unaffected by this change in temperature and volume. According to Charles's Law, there is a direct relationship between the temperature and volume of a gas when pressure is held constant, as discovered by Jacques Charles in his studies on the effect of temperature on gases.