1 answer
(click or scroll down)
https://www.google.com/search?q=the+rock+cycle&oq=the+rock+cycle&aqs=chrome..69i57j69i64j69i60.3700j0j7&sourceid=chrome&ie=UTF-8
Try making an acrostic poem out of the different terms in the rock cycle first. DON'T make short lines! Then change the words in each line to match a rhythm — perhaps da-da-DAH da-da-DAH or some rhythmic pattern that appeals to you.
If you're not sure what an acrostic poem is, here are lots of examples:
https://www.google.com/search?q=acrostic+poem&oq=acrostic+poem&aqs=chrome..69i57.2992j0j7&sourceid=chrome&ie=UTF-8