Related on TestTube:
How Much Life Do We Know Even Exists In The Ocean?
What Do We Really Know About The Ocean Floor?
Each week on TestTubePlus, we pick one topic and cover it from multiple angles. This week, we're delving deep into everything you've ever wondered or been curious about in regards to the Ocean. Over the course of the week we'll be discussing why they're so important to us, what we don't know about them, how we are currently using them, and much more. So far, Trace has explained why its so hard to track how much life is in the world's oceans, and how scientists are just now mapping the ocean floor. Today he explains why the ocean is responsible for human life (as well as all life on Earth).
The ocean holds an incredible amount of resources that humans rely on to live for a number of reasons. First and foremost, it feeds us: about 200 billion pounds of fish and shellfish are caught each year. Historically fish have played a significant role in satisfying the protein requirements of large fractions of humanity since the earliest periods of recorded history.
Another crucial role the oceans play for humanity is by way of transportation. 90 percent of everything goes by sea. It takes a lot less energy to move a boat through water, filled with people or cargo, than it does any other method of transportation. Every major city that existed before the invention of the car are by the water.
Non-renewable forms of energy, like natural oil and gas, can be found in rocks beneath the seabed. However oceans are starting to provide us with more and more forms of renewable forms energy, too. Large tides around the coasts can be used to make electricity in two ways. The first is Tidal Stream, which uses large current speeds that can occur in narrow channels and off headlands. These devices look like wind turbines, turned by the water flowing through them instead of wind. Second is Wind Energy: wind blows faster over the sea than over land so offshore wind turbines can generate up to 25 percent more energy than onshore counterparts.
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How do we use marine resources? (Hermoine.net)
"Fisheries: For food - fish, such as orange roughy, blue ling, grenadier and redfish, and shellfish (e.g., oysters, mussels, crabs and lobsters) are in high demand by communities all over the world. Oil: Fuel, plastics, man-made fibres, chemicals (e.g., pain-killers), rubber, fertilsers...the list is endless! Gas:Central heating, cooking, plastic and chemical production (e.g. antifreeze!), food-processing, some transportation."
Big data maps world's ocean floor (University of Sydney)
"It is the first time the composition of the seafloor, covering 70 percent of the Earth's surface, has been mapped in 40 years; the most recent map was hand drawn in the 1970s."
Ocean (Encyclopedia of Earth)
"Oceans cover approximately 65.7% or 335 million square kilometers (129 million square miles) of Earth's surface with a volume of about 1,370 million cubic kilometers (329 million cubic miles). The average depth of these extensive bodies of seawater is about 3.8 kilometers (2.4 miles). Maximum depths can exceed 10 kilometers (6.2 miles) in a number of areas known as ocean trenches."
Why Are Oceans Salty? (Live Science)
"Ocean water contains lots of different mineral salts: sodium, chloride, sulfate, magnesium, calcium, potassium, bicarbonate and bromide. These salts enter the ocean through rivers, which pass over rocks and soil, picking up salt along the way."