In order to breathe sharks have to keep moving. They have to engulf water to extract the oxygen in the water and then the rest of the water filters out of their gills. If the water current is very strong they can stay still.

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Do you have another great question? Check out www.beachchairscientist.com and let us know what you always ponder while digging your toes in the sand or e-mail beachchairscientist@gmail.com.

Image (c) behindblondiepark.com

In reality, there is just one ocean.

However, I understand the confusion as of late on the geographic names applied to different sections of this ocean ecosystem. While we lost a planet (Pluto), we gained an ocean! In 2000, the International Hydrographic Organization named this new ocean the Southern Ocean. Basically, it is the southern equivalent of the Arctic Ocean, except a little bit larger in sprawling space. So, there are 5 oceans.

Here they are in a listing of greatest to least in square miles:

Pacific (64,186,000)

Atlantic (33,420,000)

Indian (28,350,000)

Southern (7,848,300)

Arctic (5,106,000)

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The larger the seashell the louder the sound, right? It is the space inside the shell that creates the sound. Well, the space inside the seashell bouncing against the sounds of your surroundings.

For the most part people are experimenting with this seashell symphony at the beach where there is a lot of  space for sounds to resonate inside the seashell.

It would be the same type of sound when you put a glass up to your ear. It you put a glass up to your ear in the bathroom with the door shut you will hear very little. If you put the glass up to your ear outside, you will hear the “ocean”.

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A marine biologist studies the life in the ocean (“bio” = life). An oceanographer studies the physical elements of the oceans.

A marine biologist will study dolphins.

An oceanographer will study tides.

A marine biologist will study jellyfish.

An oceanographer will study the salt content of seawater.

A marine biologist will study algae.

An oceanographer will study the volcanic activity of the sea.

A marine biologist will study horseshoes crabs.

An oceanographer will study the plate tectonic action of the ocean.

Of course, I do not think they are at all exclusive. But, that is the general break down of who studies what.

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