1. Chapter 20-3
Ocean Resources

2. Resources
Food
Minerals
Transportation

3. Desalination
Desalination – removing salt from water
Expensive

7. Distillation Water heated Water evaporates Water condenses Salts left
Fresh water

8. Freezing When water freezes the 1st ice crystals do not have salt
Can be removed

9. Reverse Osmosis
Water is pushed through a membrane under high pressures
Salt left behind

10. Desalination Video Clip

11. Ocean Resources Petroleum – Most valuable resource Oil and natural gas
¼ of worlds oil obtained off shore

16. Nodules – Lumps of mineral on the ocean floor
Expensive to get
What country gets mineral rights?

17. Fishing – important food source
Oceans are overfished

19. Aquaculture – raising aquatic plants and animals for humans

21. Ocean Pollution Garbage Sewage Nuclear Waste
More people = more pollution