Study Guides

1. Describe the make-up of earth's hydrosphere. What percentage of earth's surface is water? What percentage of all water is saltwater?
earth's surface - between 70 and 75% water
all water - 97% salty, 2% glaciers, 1% freshwater

2. What percentage of ocean water is salt? Where is ocean salinity the greatest? What is the most common "sea salt"? What are other common elements in sea salts?
3.5% of ocean water is salt
Ocean salinity is greatest in the tropics, lowest on the poles
The most common sea s...