Oceans are seawater throughout, not only on the surface.
No, salty water has higher density, that's why it's easier to stay close to surface in sea or ocean.
because the ocean sponge gets bigger by absobing the sea water to stay alive
One example of a large body of water on Earth's surface is an ocean, such as the Pacific Ocean or the Atlantic Ocean. Oceans are immense bodies of saltwater that cover a significant portion of the Earth's surface.
Oceans are continuous bodies of water that cover most the Earth's surface, A sea is a region of water withing an ocean, partly enclosed by land. Such as the North Sea. A sea can be a large body of either fresh or salt water completely enclosed by land. Such as the Caspian Sea
A surface current is found at the surface of the ocean caused by wind patterns.
The height of the surface of the ocean is referred to as sea level.
The terms sea and ocean are usually considered to be synonymous. A sea is a sometimes defined as a division of an ocean, or a large body of salt water partially or entirely enclosed by land. An ocean is the body of the salt water covering 71% of the earth's surface, or any of the major divisions of that body of water which are called the Pacific, Atlantic, Indian, and Arctic Oceans.
A curving ridge of water on a sea or ocean is called a wave. These waves range in size and can cause damage.
The word 'sea' refers to the water that covers the greater part of the Earth's surface, one of the smallest areas of an ocean
They use ballast tanks to contain sea water or air to control their depth
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island.
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