1. Motion of the Ocean

2. Ocean Currents An Ocean Current is a mass of moving water in the ocean
Surface Currents originate from strong winds blowing over the ocean that are set in motion by uneven heating of Earth’s surface; cover large area.
Northern Hemisphere – Clockwise
Southern Hemisphere – Counter Clockwise
Ex. Gulf Stream

4. Deep Currents Dense ocean water is by the poles, because it is cold.
The cold water travels along the ocean floor

5. Deep Currents
Upwelling – When water moves from great depths to the surface bringing nutrients

6. Deep Currents
Downwelling – When water moves from the surface to great depths bringing O2

7. What contributes to the amount of dissolved oxygen in the ocean?
How does oxygen get added to the ocean?

8. PLANTS! Through photosynthesis, aquatic plants release oxygen.
It’s the exact same process as on land when plants release oxygen for us to breathe!
Downwelling helps distribute the oxygen to lower levels where photosynthetic organisms (plants) don’t exist due to a lack of sunlight.

9. Fish and other food sources for eating!
Resources of the Ocean
Fish and other food sources for eating!

10. Resources of the Ocean
Oil Deposits have been found along the shores, 30% of the world’s oil is pumped from below the seafloor

11. Resources of the Ocean
Minerals are on the ocean floor such as, iron, cobalt, copper, lead, gold, tin, diamond, salt, and gravel

12. Humans & Our Oceans

13. Overfishing
When people catch fish at a faster rate than they reproduce

14. By-Catch
Are the fish that are caught by a net, but are thrown back to sea, 30% of fish go back to sea, dead or alive

15. Ocean Pollution 44% of Ocean pollution comes from runoff
33% is from air pollution
12% is from shipping and oil spills
10% is from ocean dumping
1% is from offshore drilling

16. Ocean Pollution