1. Oceans and their formation Saturday, June 04, 2016Saturday, June 04, 2016Saturday, June 04, 2016Saturday, June 04, 2016

2. Early Earth In the first billion years after Earth formed, its surface was much more volcanically active than it is today. In the first billion years after Earth formed, its surface was much more volcanically active than it is today. Volcanoes not only spew lava and ash, they give off water vapor along with carbon dioxide and other gases. Volcanoes not only spew lava and ash, they give off water vapor along with carbon dioxide and other gases.

3. Important information about oceans 97% of all water on earth is in the oceans. 97% of all water on earth is in the oceans. Every known naturally occurring element is found in seawater. Every known naturally occurring element is found in seawater. Sea water consists of about 3.5% dissolved mineral substances that are collectively called “salts.” Sea water consists of about 3.5% dissolved mineral substances that are collectively called “salts.” Sodium (Na) and Chlorine (Cl) make up most salts. Sodium (Na) and Chlorine (Cl) make up most salts.

4. How do you think the oceans got salty?

5. Salinity The amount of salt in the Earth’s oceans has stayed constant for millions of years. The measurement of the amount of solid material (salt) dissolved in the oceans is called SALINITY.