A wooden cube is floating in a small fish tank that is filled with water. Imagine that you take this setup to a space station on the Moon. Air pressure and temperature inside the station are similar to conditions on Earth.

the cube does not move

Explanation:

The Archimedes principle is fulfilled for the wooden cube in the Earth

              B = W

              ρ g V = m g

When this cube travels to the Moon, the value of the gravity acceleration changes,

               ρ g_moon V = m g_moon

               ρ V = m

So we can see that the buoyancy of the cube does not change when changing from Earth to the Moon

In summary the cube does not move

powerful computers now, not then

change tension