Answer:
Proof you've done your time in school
What is in seasons, seconds, centuries, and minutes, but not in decades, years, or days?
You roll it or you buy it, People say you shouldn't try it, Because you may get a stroke, From inhaling all that smoke.
What is something yet nothing, but if you fill it up it will disappear?
I'm a god. I'm a planet. I measure heat.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.