Good news: He figured out which one was right quickly enough...
Bad news: ....because someone spoiled it for him
It's easy enough to show experimentally.
Atoms, we're simply wrong about. Most of the things taught K-12 are based on obsolete models like the Bohr model. That one, I'm struggling with how to teach quite a lot.
Dinosaurs and tectonic plates aren't really all that fundamental, so I'd present them as facts. I might have some fun with young earth creationism, though, if I were feeling particularly inspired.
As for evolution:
1) The theory taught in school is wrong in enough ways which matter that I do single it out. There's also a mixture of facts, hypotheses, and errors.
2) The reasoning models underlie a lot of things, from evolutionary psychology to machine learning.
3) It's politicized, and in my local school district, used to tarnish the other political side in entirely inappropriate ways.
4) My school district spends less time on tectonic plates, dinosaurs, atoms, and planets combined than they do on any of (a) evolution (b) climate change (c) critical race theory (d) virtually anything other polarized.
5) They also do it before kids are ready to engage critically.