Oceanography Seas, Oceans, Bay, Trenches, Volcanos, Shelves, Ridges, Reefs

Lets start with the water itself Oceans, seas, and bays

Oceans vs Seas Seas and oceans are two different bodies of water; the same way lakes and ponds are. While the water doesn’t suddenly change when we cross from the ocean into the sea, the term ology definitely does.

Oceans Oceans make up all bodies of salt water. “Seas” are part of the oceans, the same way all rooms in your house still are part of you house. The North Sea, for example is part of the Atlantic ocean. Same with the Bering off Alaska is part of the Pacific Ocean.

Seas Seas are smaller than oceans and usually location where the ocean meets land. Seas are usually partially enclosed by land. Oceans are open water

Bays Bays are part of seas, which again, are parts of the oceans. “Bays” are defined as a broad inlet of the sea, where the land curved inward, but does not enclose them.

Now lets go below the surface Trenches, Volcanoes, Shelves, Mountains, and Reefs

Ocean Trenches Definition: a long, narrow, deep depression in the ocean floor. Typically one running parallel to a plate boundary, marking a subduction zone. In English: a long narrow, deep ditch on the ocean floor The are the deepest parts of the ocean floor

How are trenches created? Trenches are created when tectonic plates below the ocean floor converge. When they meet, one plate goes underneath the other causing a deep gash on the ocean floor

Marianas Trench 3F4 3F4 6.8 Miles deep (11 Kilometers) That’s the distance from Devon to Nisku

Submarine Volcano Underwater vents or fissures (cracks) in the earth surface (bellow the ocean floor) where magma (liquid rock) can escape into the ocean.

Formation of Island Underwater volcanos pour out liquid magma (up to 75% of the earth magma is under water). When the magma cools it solidifies into rocks. As the rock piles up with each eruption islands are formed Hawaii was formed through volcanos

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