Send back a long-range message saying the moon's mass was changing every once in a while?

The mass will not change during the seasons; however, the length does.

The mass of the Earth plus atmosphere does not change.

Therefore, the total mass of the earth does not change due to the weight loss.

If sitting on a scale, the weight and mass would not change.

Is it really true that the mass does not change in heating?

The device only works well, however, if the mass of the particles doesn't change.

In such a system, the mass of the box would change only if energy were allowed to escape from the box as light or heat.

Finally, and most important, the masses of Iran's women have changed.

He said that mass could change into energy (or the other way around).