GEOLOGY

Detailed explanation-1: -Density is lowest at the surface, where the water is the warmest. As depth increases, there is a region of rapidly increasing density with increasing depth, which is called the pycnocline . The pycnocline coincides with the thermocline, as it is the sudden decrease in temperature that leads to the increase in density.

Detailed explanation-2: -The Pacific has most of the lightest water with densities below 26.0, whereas the Atlantic has most of the densest water between 27.5 and 28.0.

Detailed explanation-3: -The ocean has three main layers: the surface ocean, which is generally warm, and the deep ocean, which is colder and more dense than the surface ocean, and the seafloor sediments. The thermocline separates the surface from the deep ocean.

Detailed explanation-4: -What is the warmest body of water on Earth? The hottest ocean area is in the Persian Gulf, where water temperatures at the surface exceed 90 degrees Fahrenheit in the summer. Another hot area exists in the Red Sea, where a temperature of 132.8 degrees Fahrenheit has been recorded at a depth of about 6, 500 feet.