Eli5: if it were possible to weight earth precisely, to the gram, would its weight vary or stay the same over time?

Question

I understand that all on the surface is likely small in comparison the earth whole mass, but if all that is created and all which disappears is just a renewal of the same elements..is earth’s weight a constant..?

In: 21

Answer 1

No, the Earth’s mass is constantly changing. We constantly gain and lose mass as hydrogen and helium float off into space and we gain mass in the form of meteors and other space dust. On average, Earth loses more mass than it gains, but it’s such a tiny amount that it doesn’t matter.