You can use this to do science demonstrations in classrooms: A golf ball will float on saturated salt water, but sink in fresh water. You can partially fill a container with saturated salt water, then carefully fill the remainder with tap water, and the golf ball will float at the boundary between the two for a while. IIRC it can last a few weeks.
AlkaliActivated t1_is2oc2c wrote
Reply to comment by eaglessoar in Does the salinity of ocean water increase as depth increases? by rhinotomus
You can use this to do science demonstrations in classrooms: A golf ball will float on saturated salt water, but sink in fresh water. You can partially fill a container with saturated salt water, then carefully fill the remainder with tap water, and the golf ball will float at the boundary between the two for a while. IIRC it can last a few weeks.