Exposing students to a level a bit beyond that which they are expected to master, is not a bad idea. No two snow flakes are the same shape. Warm air rises. The same water goes around the water cycle forever. The oxygen - carbon dioxide cycle.
Heat is caused by molecules moving.
We get heat from Sun. Earth rotates exactly once in 24 hours. Venus is the only planet with a day longer than its year. Without the Bernoulli effect planes couldn't fly. Columbus proved that Earth is round.