Evaporation of seawater.

The oceans cover most of the earth's surface. There is a lot of difference between sea water and potable water. There are some characteristics of seawater.

• One kilogram of sea water contains about 5 grams of salt.
• Sea water becomes ice at minus two degrees.
• Most earthquakes on Earth occur in the oceans, so they are constantly shaking.
• The surface of the upper 10 feet of sea water is as hot as the whole atmosphere.
• Sea water absorbs less brown so it looks brown.
• Seawater is made up of about 20 chemicals, including 4% water and 4% salts such as chloride, sodium, sulfate, and nitrogen, carbon dioxide, and oxygen.
• Sound waves travel faster in seawater.
• Seawater has a pressure of 2.5 kg per square inch at a depth of 6 feet.
• Although seawater is not potable, it is home to thousands of sponges.