The stuff it is all made from....
Continental crust (lots of granite etc.... Si rich) vs Oceanic crust (lots of basalt etc, Fe rich)
Density: Oceanic 2.9-3.0 g/cm3 Continental 2.7 - 2.8 g/cm3
... so what?
Continental crust (lots of granite etc.... Si rich) vs Oceanic crust (lots of basalt etc, Fe rich)
Density: Oceanic 2.9-3.0 g/cm3 Continental 2.7 - 2.8 g/cm3
... so what?
And so we get this sort of thing...
also check out that NIWA map up on the wall
Source: © National Oceanic and Atmospheric Administration.
and coz it's interesting...
Below 1,000 meters, in the Bathypelagic, or midnight, zone, water is almost uniformly cold, approximately 4°C. No sunlight penetrates to this level, and pressure at the bottom of the zone (around 4,000 meters depth) is about 5,880 pounds per square inch (400 atm). Little life exists at the Abyssopelagic (abyssal) zone, which reaches to the ocean floor at a depth of about 6,000 meters. Together, these cold, deep layers contain about 80 percent of the total volume of the ocean.
http://www.learner.org/courses/envsci/unit/text.php?unit=3&secNum=2
Below 1,000 meters, in the Bathypelagic, or midnight, zone, water is almost uniformly cold, approximately 4°C. No sunlight penetrates to this level, and pressure at the bottom of the zone (around 4,000 meters depth) is about 5,880 pounds per square inch (400 atm). Little life exists at the Abyssopelagic (abyssal) zone, which reaches to the ocean floor at a depth of about 6,000 meters. Together, these cold, deep layers contain about 80 percent of the total volume of the ocean.
http://www.learner.org/courses/envsci/unit/text.php?unit=3&secNum=2
This is a cool expt... could we copy it somehow?
in air
Colours at 30m
http://white.stanford.edu/teach/index.php/Breneman