The Atmosphere

https://sunshine.chpc.utah.edu/labs/atmosphere/atmosphere_main.html

This website contains a  whole  unit on the atmosphere, complete with popup diagrams, animations, photos,   and interactive labs.   It is very thorough!   This would be a great website for intermediate or junior high students!   It could be assigned  as part of an  independent research project, self study, or as a whole class thematic unit.