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Overview of Oceans

The Pacific Ocean is the largest ocean in the world.
Oceans

Oceans cover more than 70% of the Earth's surface and contain about 97% of the planet's water supply. It's home to underwater creatures, from the smallest plankton to the largest creature on Earth, the blue whale. Find out more about the fascinating world of the ocean!

Oceans - The Big Five

There is actually only one big ocean in the world, as every ocean and sea are connected. Until the year 2000, there were only four recognized oceans, but in the spring of 2000, the International Hydrographic Organization marked out a new ocean called the Southern Ocean. Now, there are five main areas in this one big ocean.

  • The Pacific Ocean is the largest of the five main oceans. It's 15 times the size of the US, covers about 28% of the global surface and is larger than the total land area of the world. With an area of 60.1 m2, it includes the Bering Sea, Gulf of Alaska, Philippine Sea and Sea of Japan.
  • The Atlantic Ocean is the second largest ocean. It's 29.6 m2 and includes the Baltic Sea, Caribbean Sea, Gulf of Mexico and Mediterranean Sea.
  • The Indian Ocean is 26.5 m2 and includes the Arabian Sea, Bay of Bengal, Persian Gulf and Red Sea.
  • The Southern Ocean is 7.8 m2. It surrounds Antarctica and includes the Amundsen Sea, Bellingshausen Sea and Ross Sea.
  • The Artic Ocean covers the North Pole. It's frozen all the time, except at its edges. It's the smallest ocean with an area of 5.4 m2, and includes Baffin Bay, Hudson Bay and Greenland Sea.

Oceans - The Blue Factor

When sunlight hits water, part of the light gets absorbed and part of it gets reflected. Sunlight appears to be colorless, which we call white light, but it's actually made up of all the colors of the rainbow. Blue light is absorbed by water at a slower rate than other colors of light. Pure water is also said to naturally be a faint turquoise color, but it is only visible when there is a lot of water in one spot - like an ocean. These two factors combined make for the spectacularly blue water you see at beaches around the world. If there are foreign particles, like sand, dirt or algae in the water, the color of the water can change because the light is now reflecting off something other than just water.

Oceans - Light Zones

The ocean is divided into three zones based on the amount of light it receives.

  • The Sunlit Zone is the top layer closest to the surface. More than 90% of all marine life live in this zone because there is enough light entering the water for photosynthesis to occur. The Sunlit Zone, which is about 600 feet deep, is where most fish and sea animals live.
  • The Twilight Zone begins at about 600 feet under the water to about 3000 feet down. Only a small amount of light can penetrate the water at this depth. As the water gets deeper, the pressure increases, so few animals and plants live in this zone.
  • Ninety percent of the ocean is in the Midnight Zone. It's completely dark and the temperature is near freezing. Living things in this zone include the sea cucumber, vampire squid and snipe eel.

Oceans - The Salt Factor

Ever wonder why the ocean is salty? As water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of river beds. This slightly salty water then flows into the seas and oceans. Ocean water evaporates through the process of the water cycle, but the salt doesn't evaporate and remains dissolved in the ocean. As time passes, the remaining water gets saltier and saltier.

 
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Comments

CuteMoo2

CuteMoo2 wrote:

O.O I Dont Know How To Swim Lol cx
commented: Wed Apr 30, 2014

miz-wolf1

miz-wolf1 wrote:

I love to swim but I'm kind of scared of the ocean. I cant really explain why but I thi...
commented: Sun Oct 06, 2013

brunostar

brunostar wrote:

i love the ocean so much ^-^
commented: Wed Jun 05, 2013

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Teh_Skittlez
Teh_Skittlez posted in Debating:
"american_brit" wrote: "Pokemaster235" wrote: YES! WE women have been neglected for too long!!! I wouldn't necessarily say that. The fight for women's rights has gone on and those for feminist  rights seem to have won. Sure, there is no way to fully promote equal rights, but when it comes to women's place in society -at least in places such as the United States and European countries and in many other regions- it's been on a more leveled playing field with men.  So here? Here where I am? I'm satisfied. I don't believe that women's rights have been neglected. In some ways, they're held above those of men. But out there? Beyond the borders of my "humble" dwelling, there are some problems. Women are abused and seen as lesser. (I'm trying to put this in nicer terms. I don't think it's working... :/)  I think we need to work on fixing those, instead of complaining about how we're deprived as our rights. Because honestly? We have no idea how bad it is.  Sorry,  I went on a mini tangent.  I think your tangent was very good. You seem to have a pretty solid grasp of the situation, and you also are capable of expressing it well. Great post, great job.
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KittehFace
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american_brit
american_brit posted in Debating:
"catseli" wrote:I think that people should respect other people who are wiser than you. For example a 10 year old should respect a 11 year old but that 10 year old has to respect a grandpa because the grandpa is smarter and wiser than the 10 year old. I don't believe respect should be based off of level of intelligence or wisdom.  Also, age doesn't play a factor in how "smart" a person is. It does affect how much experience someone may have in the world though, thus more knowledge gained... (: But knowledge is not equivalent to sagacity. Honestly, I'm not sure if this makes any sense. I'm tired and I'm going to be going to bed soon. I'll have to check this out later. Thanks! Goodnight!
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american_brit
american_brit posted in Debating:
"AlphaT" wrote:Yes, but not the kind of respect you are thinking of. A 10 year old should respect a 30 year old in a way of authority, but a 10 year old should respect an 11 year old in a way of respecting a peer. (Sometimes I find technology really irritating :annoyed. Like now. Here goes my third attempt of posting. Yay...) Agreed. Not to say that a 30 year old deserves more respect, but it should be displayed differently. The ways I respect my mom and my two year old neighbor, for example, are both distinct -but it's respect all the same. Everyone deserves respect (Gosh I feel redundant), but is should be presented in a way that's unique to the individual. 
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american_brit
american_brit posted in Debating:
"Pokemaster235" wrote:YES! WE women have been neglected for too long!!! I wouldn't necessarily say that. The fight for women's rights has gone on and those for feminist  rights seem to have won. Sure, there is no way to fully promote equal rights, but when it comes to women's place in society -at least in places such as the United States and European countries and in many other regions- it's been on a more leveled playing field with men.  So here? Here where I am? I'm satisfied. I don't believe that women's rights have been neglected. In some ways, they're held above those of men. But out there? Beyond the borders of my "humble" dwelling, there are some problems. Women are abused and seen as lesser. (I'm trying to put this in nicer terms. I don't think it's working... :/)  I think we need to work on fixing those, instead of complaining about how we're deprived as our rights. Because honestly? We have no idea how bad it is.  Sorry,  I went on a mini tangent. 
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