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In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox.

The day that the Earth's North pole is titled closest to the sun is called the summer solstice .It is also the day that the sum reaches its highest point in the sky. The winter solstice, or the shortest day of the year,happens when the Earth's North pole is titled farthest from the sun.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

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