Kw-logo-smaller

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.

 
Related Stories:

 

>
>

readers voted!

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

there are 4 more comments

Please login or register to add comments

share with your friends


Twitter Facebook Myspace Digg


like this article?
Sign up now to get more just like!

latest videos

F1108575610203

What Do You Like About the Ocean?

  • Everything - I wish I could live in the ocean!
  • The relaxing sound of the tide coming in.
  • The waves - surf's up!
  • Nothing - I'm afraid of the water.

related stories

Micro_a pre
As summer warms up, you're probably hanging around the lake or ocean more and more to keep cool. ...
Micro_a m
Kidzworld’s All About Animals is going to take a look at Dolphins this week! Dolphins are the fri...
Micro_world-ocean-day-micro
June 8 is World Oceans Day in honor of our, magical, mysterious ocean! So much about our ocean is...
Micro_costarica-article
Costa Rica is a country in Central America that’s got two spectacular bodies of water on either s...

Random in the forums

Teh_Skittlez
Teh_Skittlez posted in Debating:
"AlphaT" wrote: "Teh_Skittlez" wrote: "AlphaT" wrote: "Teh_Skittlez" wrote: "Vampire Poison" wrote: I'm not exactly sure about this one, I do feel like we should have the death penalty, and then again, I think it's cruel. I believe that it depends on the kind of person and what their crime is. I would feel a lot safer if a person who was a serial killer wasn't around anymore. Again, the Anders Breivik case is a great example of a country treating a mass murderer like a human being rather than a monster (after all, we are a little bit old to be believing in monsters).  So...after reading up on him, I'm very surprised.  He was the Taliban's Taliban.  But he's twisted. He should not of been deemed sane. He should be spending the rest of his days in Solitary Confinement.  Would locking this man in a small space and letting his mind corrode even further really service anyone? Would you or I actually be better off? Do you think the victims' families will be safer at night knowing we've crushed the psyche of a murderer?  Being in prison is good enough, and he'll stay in prison as long as he's a threat, I see no reason that we need to torture him (and that is exactly what indefinite solitary confinement is), other than to satisfy our primal desires. This is why I consider this such a progressive decision. Treating even mass murderers like human beings who still have potential value is progress.  Crushing his psyche is more humane then killing the man. And at this point, he's not going to be much good to society.  Not every psychopathic murderer can come back to be a good citizen. Should he get a shrink? Of course. But if he's deemed "broken beyond repair" I don't see why we should let him be among others, so that he can either be martyr'd for his beliefs in jail or kill a Muslim who is in the prison, or spread his message to to others.  The compromise is that we need to have a volley of psychological tests to determine if they could be fixed (And yes, i know it's not that simple...but its better then letting EVERY SINGLE PSYCHOPATH in a regular prison) and use those tests to place them either in a regular prison, or have a makeshift Arkham Asylum, or solitary confinement.  I think you're confusing high-security and solitary confinement. There is absolutely no reason to keep anybody in solitary confinement indefinitely. We do not need to kill him, or crush his psyche, we have other options. IF he is still deemed unsafe, they can deal with him as they see fit. Obviously if he presents an active danger to other inmates, he should be kept away, but I seriously question the idea that we should preemptively punish him for things he hasn't actually done yet. I don't disagree that it's a case-by-case basis, obviously not every murderer can be reintegrated into society, but if there's even one, don't you think we should give him that opportunity? I think we should start by assuming that every one can be rehabilitated (which obviously won't happen), and then narrow it down from there, not the other way around. Prison is not about making people uncomfortable, it should be about keeping society safe, and about reintegrating violent criminals into a safe society. 
reply 21 minutes
Fenmore
Fenmore posted in Say Anything:
potato
reply 22 minutes
WizardMorgan
COOKIES  :)
reply 30 minutes
AlphaT
AlphaT posted in Say Anything:
Store bought posters, be swaggin in dat room yo.
reply 36 minutes
Macbarbie09
Macbarbie09 posted in General:
Welcome to my August faves! Here are some of my Fave things in August: Song: Dancing Queen- ABBA!! That song is so Awesome!! Rude- Magic!!!  Why you gotta be so rude? Don't you know im Human too? Food: Ice Cream! Game: Pokemon X!! Show: How i met your mother what are some of your faves from August??
reply 43 minutes

play online games

Candy-100

A great online version of the famous Candy Crush. This is the best game launched...

1515_gl_kidzworld_100x100_jpg_fz

Intriguing planets, weird and wonderful characters; challenge friends and find a...

157262_(2)

When you go back to Candyland, you’ll wonder why you ever left in the first plac...

100x100_ra_logo_girl

Uncle George has left you his farm, but unfortunately it’s in pretty bad shape. ...

_thumb_100x100

Shoot blobs with different properies to merge yellow blobs. Your blobs can be re...