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Chapter 20-3 Ocean Resources
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Resources Food Minerals Transportation
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Desalination Desalination – removing salt from water Expensive
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Distillation Water heated Water evaporates Water condenses Salts left
Fresh water
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Freezing When water freezes the 1st ice crystals do not have salt
Can be removed
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Reverse Osmosis Water is pushed through a membrane under high pressures Salt left behind
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Desalination Video Clip
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Ocean Resources Petroleum – Most valuable resource Oil and natural gas
¼ of worlds oil obtained off shore
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Nodules – Lumps of mineral on the ocean floor
Expensive to get What country gets mineral rights?
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Fishing – important food source
Oceans are overfished
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Aquaculture – raising aquatic plants and animals for humans
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Ocean Pollution Garbage Sewage Nuclear Waste
More people = more pollution
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