1. Oceanography
The study of the earth's oceans and their interlinked ecosystems , geological, chemical and physical processes.

2. Origin of Oceans
As volcanoes erupted, they spewed lava, ash, water vapor, carbon dioxide, and other gases.
Scientists hypothesize that about 4 billion years ago, water vapor accumulated in Earth’s atmosphere.
After millions of years, it cooled enough to condense into storm clouds
Torrential rains began to fall and fill basins, which eventually joined to form oceans.

3. Origin of Oceans
About 71% of the Earth’s surface is covered with water.
The oceans hold 97% of Earth’s water.
About 3% of Earth’s water is fresh water.

4. Less than 1% of ALL water on Earth is usable to humans!
Origin of Oceans
Less than 1% of ALL water on Earth is usable to humans!

6. Water on Earth

7. Origin of Oceans Groundwater is stored in aquifers
Icecaps & Glaciers are found at the poles and in Greenland