Okay...
This was a Frank Capra produced education film. There are two
of them, to be exact.
Back in the 70s, they were shown in our classroom on a 16mm projector.
Seems like a lot of people saw those same films as teens in their school.
So much so, that Joe Dante used a clip from it in Gremlins.
Ejanss,
I owe you an apology.
It was Frank Capra's Wonders of Life.
Didn't recognize it from the box art, but when I referenced it
on YouTube, I immediately recognized the scientist in the film.
Thanks for obtaining the name of that title.
Ejanss,
No, it was a live-action science film with a scientist who appeared
in several different 16mm episodes.
I remember they showed it in Gremlins during the scene where a
Gremlin gets loose in the classroom.
No blockbusters (although I know you want Blockbusters).
We saw the same 16mm science series films that were highlighted
in the movie GREMLINS.
Also, Winter of the Witch