Is the total mass of the Earth (and everything on it) getting bigger?
The total mass of Earth is growing (slowly) due to the infall of meteors and particles from the Solar wind. At the same time, a tiny bit of gas is being lost at the very top of the atmosphere where it is carried away by that same Solar wind. Also, of course, a number of spacecraft have been launched away from Earth and their gross weight by now is several tons. Overall, the total mas of Earth is probably decreasing over time, but it is such a tiny, tiny loss of mass compared to the whole that any appreciable change would have to be measured in billions of years. As far as “everything on it” gaining mass, no.
