Final answer:
The acceleration due to gravity is the quantity that would be different on the moon compared to the earth.
Step-by-step explanation:
The quantity that would be different on the moon compared to the earth is A. acceleration due to gravity. The acceleration due to gravity on the moon is only 1.625 m/s², while on earth it is 9.8 m/s². This means that objects will weigh significantly less on the moon compared to earth, even though their mass remains the same.