Question

An object floats in sea water more readily because of sea water's:

Answer 1

salinity (salt content)

Answer 2

I would say density, which is a consequence of salinity. Floating on normal water occurs because the floating object is less dense than the water. Sea water contains many dissolved ions in the same volume of water and as such is more dense. Therefore, an object that may be too dense to float in normal water may still be able to float on sea water.

Answer 3

exactly^

Answer 4

Haha :)