Final answer:
Mass is a measure of the amount of matter in an object that doesn't change, while weight is the gravitational force on an object that varies with the strength of gravity.
Step-by-step explanation:
When considering the concepts of mass and weight, it is vital to recognize their differences. Mass is the amount of matter in an object and does not change regardless of an object's location - it is an intrinsic property of the object itself. On the other hand, weight is the force exerted by gravity on an object, which can change based on the gravitational field that the object is in. For example, when an astronaut travels from Earth to the moon, their mass remains the same, but their weight decreases because the moon's gravitational pull is weaker than Earth's.