Advertisement Upgrade to remove ads

Oceanic Zone

extends from 200 meters deep all the way down to the bottom of the ocean

Ocean Trench

the deepest parts of the ocean

Photic Zone

the top layer of the ocean where sunlight penetrates


a chemical process where plants and algae use a sun's energy to make sugars from carbon dioxide and water


the plant and algae component of the plankton


a living thing that produces its own food within itself, usually by using sunlight energy in photosynthesis


the amount of dissolved solids in seawater


a volcanic peak that rises at least 3280 feet from the floor


capable of continuing over a long period of time without causing permanent damage


the upward movement to the ocean surface of deeper, cold and usually nutrient-rich waters


animal component of the plankton that feed on phytoplankton and other zooplankton

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording