This is a 4 minute video showing where the mass of a tree comes from. The interviewer asks people of various ages where the "stuff" that makes up a tree is derived. The video also describes an early experiment conducted to determine where the mass of a tree comes from. Short, entertaining and informative for students of all ages. If youtube is restricted at your school, this video can also be found on a number of other sites as "Where to trees come from?"

http://www.youtube.com/watch?v=2KZb2_vcNTg

Researchers should cite this work as follows:

• Kathy Daniels (2012), "Where do trees come from?," https://stemedhub.org/resources/1336.

  BibTex | EndNote

1. carbon cycle