News tagged with seawater
A system that's worth its salt: New approach to water desalination could lead to small, portable units
(PhysOrg.com) -- Potable water is often in high demand and short supply following a natural disaster like the Haiti earthquake or Hurricane Katrina. In both of those instances, the disaster zones were near ...
Nanotechnology / Nanomaterials
Mar 21, 2010 |
4.6 / 5 (23) |
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Cheap hydrogen fuel from seawater may be a step closer
(PhysOrg.com) -- A new catalyst has been developed to generate hydrogen from water cheaply, but the research was originally intended to make molecules that behaved like magnets. Hydrogen is a clean power source ...
Apr 29, 2010 |
4.5 / 5 (21) |
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Could an Aqua-Net Bring Water to the Desert?
(PhysOrg.com) -- Challenges of the future include energy use and continued population growth. And, while there are millions of square miles of land available in the world, not all of it is considered fit for ...
Jul 29, 2010 |
3.5 / 5 (24) |
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New entropy battery pulls energy from difference in salinity between fresh water and seawater
(PhysOrg.com) -- A team of researchers, led by Dr. Yi Cui, of Stanford and Dr. Bruce Logan from Penn State University have succeeded in developing an entropy battery that pulls energy from the imbalance of ...
Nanotechnology / Nanomaterials
Mar 25, 2011 |
4.6 / 5 (18) |
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More possible branches to the domain of life
(PhysOrg.com) -- When it comes to the current domain of life, we are familiar with the three branches: bacteria, archaea, and eukaryotes. However, Jonathan Eisen of UC Davis and his team have published possible ...
Mar 30, 2011 |
4.1 / 5 (16) |
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Geologist says there's no need to fight over mineral resources
It's easy to be a pessimist in a world full of calamities. But for those worried about the continuing availability of natural resources, data from the ocean makes a good case for optimism, says economic geologist Lawrence ...
Space & Earth / Earth Sciences
Oct 07, 2010 |
4.7 / 5 (13) |
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Is the Pacific Ocean's chemistry killing sea life?
The collapse began rather unspectacularly. In 2005, when most of the millions of Pacific oysters in this tree-lined estuary failed to reproduce, Washington's shellfish growers largely shrugged it off.
Jun 21, 2009 |
4.6 / 5 (13) |
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Acid test: Study reveals both losers and winners of CO2-induced ocean acidification
(PhysOrg.com) -- As the world’s seawater becomes more acidic due to rising atmospheric carbon dioxide, some shelled marine creatures may actually become bigger and stronger, according to a new study.
Space & Earth / Earth Sciences
Dec 01, 2009 |
4.3 / 5 (13) |
8
Mars was Wet, but was it Warm?
Mars is frozen today, but when it was young there may have been liquid water on its surface. What does the latest evidence indicate about the ancient martian climate? Understanding the past environment of ...
Space & Earth / Space Exploration
May 31, 2010 |
4.9 / 5 (11) |
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Scientists locate apparent hydrothermal vents off Antarctica
Scientists at Columbia University's Lamont-Doherty Earth Observatory have found evidence of hydrothermal vents on the seafloor near Antarctica, formerly a blank spot on the map for researchers wanting to learn ...
Space & Earth / Earth Sciences
Mar 03, 2010 |
4.5 / 5 (11) |
20
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Climate change in Kuwait Bay
Since 1985, seawater temperature in Kuwait Bay, northern Arabian Gulf, has increased on average 0.6°C per decade. This is about three times faster than the global average rate reported by the Intergovernmental ...
Space & Earth / Earth Sciences
Nov 30, 2009 |
3.7 / 5 (13) |
1
Signs point to sponges as earliest animal life
(PhysOrg.com) -- Even Charles Darwin was puzzled by the apparently sudden appearance in the fossil record of a great variety of multicellular creatures — a rapid blossoming known as the Cambrian explosion. ...
Biology /
Feb 04, 2009 |
4.3 / 5 (11) |
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Hot rocks fire up energy from the depths
(PhysOrg.com) -- Scientists at Newcastle University have completed the first phase of a giant central heating system that will harness heat from deep underground.
Space & Earth / Earth Sciences
Jun 23, 2010 |
4.3 / 5 (11) |
0
World's oceans get an acid bath
Among the repercussions of global climate change, the effect of ocean acidification on marine life is one of the least-understood variables.
Feb 22, 2012 |
4.3 / 5 (11) |
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Fukushima nuke pollution in sea 'was world's worst'
France's nuclear monitor said on Thursday that the amount of caesium 137 that leaked into the Pacific from the Fukushima disaster was the greatest single nuclear contamination of the sea ever seen.
Oct 27, 2011 |
4.6 / 5 (10) |
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Seawater
Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5%. This means that every 1 kg of seawater has approximately 35 grams of dissolved salts (mostly, but not entirely, the ions of sodium chloride: Na+, Cl-). The average density of seawater at the surface of the ocean is 1.025 g/ml; seawater is denser than freshwater (which reaches a maximum density of 1.000 g/ml at a temperature of 4°C) because of the added mass of the salts. The freezing point of sea water decreases with increasing salinity and is about -2°C (28.4°F) at 35 gram per liter.
For more information about Seawater, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
