Where Do Trees Get Their Mass?

"Where do trees get their mass?" - ▶ this video This was highly enlightening the first time I watched it :)

An interesting corollary to this is "Where do trees get their mass?" Veritasium has a fun video demonstrating how unintuitive this is: ▶ this video

There's a nice Veritasium episode wherein he asks people on the street where a tree's mass comes from: ▶ this video (This isn't just one of those "let's laugh at how dumb people on the street are" videos; it's done explicitly as a learning exercise. His PhD looked at how addressing misconceptions and going from there to correct explanations works much better than simply providing explanations: link ) I thought of it upon seeing the first chart in the BMJ article.)

And the reverse biochemical process is equally misunderstood. I used to teach high school Science and everyone thought a tree's mass came from the soil. ▶ this video