Question

while testing normal water and the sea water than normal water .why?​

Answer 1

Answer:

Because objects float better on a dense surface, they float better on salt water than fresh water. The denser the salt water, the easier it is for objects to float on top of it.

Answer 2

Sea water contains more dissolved salts than the drinking water. Therefore, it is more conducting than the drinking water. Due to this reason, the compass needle deflects more in seawater than in the drinking water.