The part of the ocean that is mixing of water most vigorous is from 2 to 3 kilometers down. Thermocline is a layer between
warm water from the ocean’s surface and cool water from below the ocean. In
here, the temperature decreases rapidly from the warmer layer to the colder
layer. A thermocline forms due to the
heat of the sun heating the ocean’s surface. Because of the difference in
density between warm and cooler ocean water, cooler ocean water sinks and
warmer ocean water floats. This is caused due to the heat and mass transfer
between particles of the ocean. The answer is letter C. The sun’s radiation
does not extend below a certain depth; therefore, deeper ocean water is colder
than surface water.
