True or false? the molecules in a solid have *more* thermal energy than the molecules in a gas?

This is False.

Molecules in a gas have more thermal energy than molecules in a solid. Think about what you have to do to change a solid (like ice) into a liquid (like water) and then into a gas (like steam). You have to increase the temperature. That increase in heat results in more thermal energy in a gas.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.