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


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

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

Kelly partygirl 24
A Walk To Remember
reply 7 minutes
-Karpov-
-Karpov- posted in General:
Kalevala
reply 22 minutes
XxneonhipsterxX
archcast let max in max look at archcast rly big house and it look beautiful too archcast open the door to his training ground  archcast:welcome to the training ground ★ max was shocked how big and awsome it was  max:woah this is so cool  archcast: 20 push ups max: haha funny archcast  archcast: did i say it was a joke do 20 push up NOW LET GO max:oh god....... after all the warm up they now do the main part of training  archcast: alright your going to do straights your traget is me go  max went over used his powers and ran to hit archcast but he failed by archcast failing strike  max: AAAAAAH THAT HURT STOP STRANGELYING ME GAAAA archcast: i said straight everyone should do this max again  max: ow ok......i should have listened to him  max did the move 20 time and failed but then his last one archcast told him to do a lap  max: im done  archcast: - strangely max- i can believe you cant even do a straight stupid  max: ok im sorry you keep strangely me  archcast: you know why i do this......cause it get you to get more mad plus get you stronger if you can do a straight show me now  max: alright i show you  max use his electronic power and ran across and quickly electric archcast chest archcast heal fast after max did his attack  archcast: see it take focus to do a attack we start 6:00 am dont be late  max hugs archcast  max: thank you archcast hey wanna go to my house my mom and you can totally meet  archcast: OH um..........-blush- um sure  with kenny  kenny look at the mirror his eyes where mostly depressed and his face was too until kenny snap kenny wanted to kill vanguard for what he did kenny got dressed and flew out of his room to vanguard lair  kenny: im gonna distroy you FORGOT YOUR DEAL  to be continued
reply about 1 hour
Charulata
Charulata posted in Say Anything:
YeS
reply about 2 hours
XxneonhipsterxX
supernatural adventure  episode 8  rose appeared with her water powers as she burts away the darkness however vanguard was defeated vanguard was mad mostly after that he left and ditched kenny kenny woke up until the boys woke up tanner got up and went up tp  kenny kenny got up too tanner was not happy at all  tanner: I WANNA HURT YOU -hands burts up in flames-  tanner body was full a fire his eyes and the fire of anger and his hand where balls of fire  tanner: YOU ARE SO DEAD  mason: tanner calm down it gonna be ok  kenny: tanner im sorry and everyone im sorry i... tanner: OTHER QUESTION WHY WAS VANGUARD BEING NICE TO YOU PLUS HELPING YOU TELL ME  david: tanner it all right kenny i believe is being with vanguard or something like that  kenny: guys.....david is maybe right I MEAN O.O  max: WHAT  rose came up to the boys  david: WAIT WAIT WAIT WAIT WAIT YOUR WITH VANGUARD  tanner: -growl- that explains EVERYTHING!!!!!!!! LET FRIGGIN HURT THIS JOCK  mason: GUYS CALM DOWN TANNER PLZ CALM DOWN  tanner: WHY CANT I WHY CANT I HIT THE #### OUT OF HIM  mason: cause it going too far calm down tiger.............calm down -a heal power of cold and peaceful has been put on tanner-  tanner:........fine  mason: so your with vanguard  kenny: i did a deal with vanguard -cries- im so sorry guys plz dont leave me i did a battle with him and we went there it all my fault -cries harder- Vanguard THAT JERK THIS IS ALL MY FAULT WHY DID I DO IT I DONT KNOW IM SO SORRY I CANT THIS THIS POWERS ####  mason:.........kenny i understand but i dont think your friend would trust you this time because of what you did but kenny what you done is hard to explain  kenny: i just wanna kill myself  tanner: plz dont say that -tears falls- JUST DONT  kenny see most of his friends cry but not rose rose is shocked on what happened  rose:it gonna be ok kenny -hugs-  kenny: im just so sorry i just dont know what happened to me -cries-  everyone came over and hugged kenny it was about to rain everyone walk together home no one rly talk to each other like alway everyone was just quiet until max david and rose got to max house max got in the house  david: well sorry about today  rose: oh it ok i get these sometimes myself  david: yea hey rose you know i like you right   rose: yes.... david and rose went close to each other and then kissed  max came but he saw O.O he akwardly went back inside  next day  max knocks on archcast door  max: ARCHCAST ARCHCAST !!!!!!!!!  archcast: -opens door- what do you want kid T_T  max: i want you to train me  archcast: HA! you dont even have the guts kid max: ARCHCAST LISTEN TO ME I NEED MORE HELP ALL MY FRIENDS GOT IT BUT I DONT GOT IT WITH MY TRAINING  archcast: you wanna go my way well it evolves pain,laps,painful push ups,fighting beating up,me giveing you a little abit a pain everytime you fail and MOSTLY DEATH AND SUPERNATURAL -sips coffee-  max: ARCHCAST COME ON I WILL LET YOU MEET MY MOM SHE STILL SINGLE ;-)  archcast: -sigh- look kid i dont wanna hurt you  max: ARCHCAST IM NOT LEAVEING UNTIL I HAVE A APPROVAL  archcast: -sigh- fine come in  ☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆
reply about 2 hours

play online games

Candy-100

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

Big_icon_(7)

Have you ever fancied being a ranger like those fantasy characters you love so m...

Hour-of-code-tumb

Millions of Students will be doing an Hour of Code with Tynker December 8th-14th...

Big_icon_(4)

You run across the city in a car chase with the police officers.

Big_icon_(6)

The evil master kidnapped all of your friends!