Why does a glass marble always sink to the bottom in water and other liquids?

Question : Why does a glass marble always sink to the bottom in water and other liquids?
In my physics lab the glass marble sank to the bottom in water, saltwater, rubbing alcohol, and cooking oil
glass sink

Best answer:

Answer by C B
as long as the liquid is less dense than glass, then yes. For reference, the density of glass is 2000 to 8000 kg/m^3 depending on the type of glass and the density of water at 0 C (freezing point) is rougly 1000 kg/m^3