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oceans

Oceans and Marine Life
Image: NASA

Oceans and Marine Life

Wrapping the globe and divided into regions, three major oceans make up most of our planet, interconnected to form seven seas. But they are much more than liquid.

Find out about their fantastic physical features, the countless kinds of organisms, their unique and interesting qualities, as well as what “drives” them around the globe.

HowStuffWorks
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The Ocean Throughout Geologic Time

The Ocean Throughout Geologic Time

Millions and millions of years ago ocean life-forms looked quite different from what you see today. Slide through time to witness some changes. More...

Images
Smithsonian
Ocean Photo Galleries

Ocean Photo Galleries

Take a close look at ocean creatures ranging from dangerous to unique and colorful to colossal, plus pictures of crises facing our seas. More...

Images
National Geographic
Map Quiz Game:  World’s Oceans, Seas, and Lakes

Map Quiz Game:  World’s Oceans, Seas, and Lakes

Time yourself and your geography prowess when it comes to Earth’s bodies of water. More...

Interactive
Seterra
Ocean Issues Quiz

Ocean Issues Quiz

Where do you stand on the state of the sea? Take this quiz for 10 ways to find out about pollution, warming oceans, habitat loss, and other watery issues. More...

Interactive
National Geographic
The Wave Machine

The Wave Machine

Build your own ocean wave here. Then follow the links. Find out about tsunamis, as well as "freak waves" higher than a 10-story building. More...

Interactive
PBS
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Ocean vs Sea

Ocean vs Sea

Smaller than an ocean, salty, and partially enclosed by land: That’s what defines a sea. Learn the locations of the 6 largest seas and other salient facts. More...

Article
Diffen.com
Swimming in Acid: Understanding Ocean Acidification

Swimming in Acid: Understanding Ocean Acidification

Scientists are concerned that oceans are absorbing too much carbon dioxide and becoming more acidic. Evaluate the effects of ocean acidification on marine life. More...

Activity
Science Buddies
The Thermohaline Circulation - The Great Ocean Conveyor Belt

The Thermohaline Circulation - The Great Ocean Conveyor Belt

Watch the flow of the Gulf Stream and other ocean currents, driven mostly by the wind. One type of current combines the surface and ocean depths. Find out what causes it. More...

Video
NASA
What Is Ocean Color?

What Is Ocean Color?

Why does the ocean look blue? Because water absorbs red and reflects blue light. But dive a little deeper to discover which seawater substances affect the color you see. More...

Article
NASA
What’s an Ocean Garbage Patch?

What’s an Ocean Garbage Patch?

A thin plastic layer skims several spots on the ocean surface. Watch to see how this plankton-size plastic from cups, bags, and other garbage makes for dangerous fish food. More...

Video
Discovery
Why the Ocean Matters

Why the Ocean Matters

The ocean is our planet’s life-support system, but it’s in grave danger. Watch to see how you can help make the ocean healthier. More...

Video
National Geographic

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