Definitions in the Field: Photosynthesis

Definitions in the Field: Photosynthesis

Did you know that most of the oxygen we breathe comes from tiny plants in the ocean? They make it using a process called photosynthesis. National Geographic Explorer and oceanographer Branwen Williams explains how plants use sunlight to feed themselves and give us oxygen.


5 - 8


Biology, Ecology

Media Credits

The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited.

Produced by
Red Rock Films
Supervising Producer
Mary Stephens, National Geographic Society
Executive Producer
Vanessa Serrao, National Geographic Society
Ashley Holmes, National Geographic Society
Tyson Brown, National Geographic Society
National Geographic Society
Production Managers
Gina Borgia, National Geographic Society
Jeanna Sullivan, National Geographic Society
Associate Producer
Sam Sheline, National Geographic Society
Program Specialists
Sarah Appleton, National Geographic Society, National Geographic Society
Margot Willis, National Geographic Society
Last Updated

September 27, 2022

For information on user permissions, please read our Terms of Service. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. They will best know the preferred format. When you reach out to them, you will need the page title, URL, and the date you accessed the resource.


If a media asset is downloadable, a download button appears in the corner of the media viewer. If no button appears, you cannot download or save the media.


Text on this page is printable and can be used according to our Terms of Service.


Any interactives on this page can only be played while you are visiting our website. You cannot download interactives.

Related Resources