Final answer:
During free fall, such as skydiving, a scale attached to your feet would read zero because there would be no normal force to measure, indicating apparent weightlessness. Mass remains unchanged, but weight, as measured by the scale, can differ depending on gravity.
Step-by-step explanation:
If a weight scale shows that you weigh 200 kg on the surface of Earth and then you skydive with both of your feet attached to the scale, during free fall, the scale would not read 200 kg. During free fall, everything is accelerating downwards at the same rate due to gravity, so the scale would not provide any force back against your feet, which is how it measures weight. In such a scenario, the scale would read zero because there is no normal force acting on the scale.
Bathroom scales measure your weight, which is the force due to gravity acting on your mass. This force is measured when the scale compresses due to your body's mass causing a downward force. In a state of free fall, such as skydiving or in an elevator whose cable has snapped, there would be no compressive force on the scale's springs, leading it to read an apparent weight of zero, indicating weightlessness.
Your mass remains the same, regardless of location (Earth, Moon, or skydiving), but scales measure weight, which varies with the acceleration due to gravity. On the Moon, your mass would be the same as on Earth, but the scale would measure a different weight because the Moon's gravity is weaker than Earth's.