after earth cooled down from being a large ball of molten lava , the water vapour in gaseous state turned into liquid and it poured rain for thousands of years filling all the oceans we see now and as the rocks were filled with salts and minerals the ocean became salty
A longer melt season in Antarctica leads to a greater loss of land-based glacier ice. The water from the melted land glaciers runs into the oceans and leads to an overall increase in volume. This change has global effects.
