This is just like the way clouds form on the Earth, or bubbles rise in a pot of boiling water: hot gas rises, and cool gas sinks.
(This; is; just like the way) (clouds; form; L:on the Earth) (This; bubbles; rise in a pot of boiling water)
This clouds This
is form bubbles
just like the way
L:on the Earth
rise in a pot of boiling water