Question

Which layer of the ocean has a thickness of about 1000 metres?

• A. First layer
• B. Second layer
• C. Third layer
• D. Fourth layer

Answer 1

The correct option is B Second layer

Ocean temperatures vary with depth.

The first layer represents the warm surface ocean water, having a depth of around 500 meters and a temperature range between 20-25 degree Celsius.

The second layer sees a rapid fall in temperature. This layer is called Thermocline and is 500 to 1000 meters thick.

The third layer, has the lowest temperature and extends till the deep ocean floor.