We all know that if you weigh yourself on the moon, it is less than your weight on the Earth. Can you tell me something that actually weighs more on the moon than on Earth?
A helium filled balloon; or a balloon filled with any gas lighter than air.
Earth’s atmosphere causes a helium balloon to float, thus making it impossible to weigh. On the moon, the lack of atmosphere causes the balloon to sink, allowing it to be weighed. It will only weigh a little bit, but will still be heavier than on earth.